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aftertale alphys ambiguous_gender animated_skeleton aquatic bone clothing coat comic dancing english_text eye_patch eyewear female fish frisk_(undertale) geno_sans_(aftertale) gloves handwear heart_symbol human humanoid loverofpiggies machine male mammal mettaton mettaton_ex not_furry papyrus_(undertale) robot sans_(undertale) scarf simple_background skeleton smile text topwear undead undertale undertale_(series) undyne white_background

aftertale alphys ambiguous_gender animated_skeleton anthro aquatic asgore_dreemurr bone boss_monster_(undertale) bovid caprine clothing coat comic crown eye_patch eyewear female fish frisk_(undertale) geno_sans_(aftertale) gloves gradient_background handwear happy headgear horn human humanoid loverofpiggies machine male mammal mature_anthro mature_male mettaton mettaton_ex papyrus_(undertale) robot sans_(undertale) scarf simple_background skeleton smile text topwear undead undertale undertale_(series) undyne

anthro arms_tied arthropod bdsm bee bee_costume belly big_belly blush bondage bound heart_symbol hi_res hotlegmeme hymenopteran inflation insect male mettaton mettaton_ex restraints rope rope_bondage solo submissive submissive_male undertale undertale_(series) wings

belly big_belly blush bodily_fluids dialogue drooling english_text getinthegut heart_symbol humanoid machine male mettaton mettaton_ex not_furry robot saliva text tongue undertale undertale_(series) vore

actually-mettaton big_breasts black_hair breasts cleavage clothed clothing collar crossgender dialogue english_text female hair hair_over_eye heart_symbol huge_breasts humanoid hyper hyper_breasts leash machine mettaton mettaton_ex mtf_crossgender not_furry offering_collar one_eye_obstructed open_mouth partially_clothed pink_eyes robot simple_background skimpy solo teasing text thick_thighs undertale undertale_(series) wide_hips

alphys ambiguous_gender android animal_humanoid animated_skeleton aquatic aquatic_humanoid arachnid arachnid_humanoid arthropod arthropod_humanoid asgore_dreemurr asriel_dreemurr asriel_dreemurr_(god_form) beard black_hair bone boss_monster_(undertale) bovid caprine cave_story chara_(undertale) clothing crossover digital_media_(artwork) elemental_creature eye_patch eyewear facial_hair felid female fiefio fish fish_humanoid flora_fauna flowey_the_flower frisk_(undertale) fur goat group hair happy headshot_portrait hi_res horn human humanoid lizard long_ears machine mad_dummy male mammal mettaton mettaton_ex monster_kid muffet napstablook papyrus_(undertale) parody pixel_(artwork) plant portrait red_hair reptile robot sans_(undertale) scalie skeleton smile spider_humanoid style_emulation tem temmie_(undertale) toriel undead undertale undertale_(series) undyne white_body white_fur

android anon areola big_breasts black_hair boots breasts clothing crossgender duo female footwear hair humanoid jamesab machine mettaton mettaton_ex nipples not_furry robot shoes undertale undertale_(series)

4_arms adult_swim animal_humanoid arachnid arachnid_humanoid arthropod arthropod_humanoid blade blush cartoon_network clothing crossover crown female grey_body grey_skin group hanna-barbera headgear humanoid humor interspecies jealous kissing larger_male love machine male markings metal mettaton mettaton_ex missile muffet multi_arm multi_limb pigtails plant purple_body purple_skin red_eyes robot romantic romantic_couple shrub size_difference space_ghost_(series) spider spider_humanoid the_brak_show thundercleese undertale undertale_(series) whitexkitty wrist_rocket wrist_weapon

alphys ambiguous_gender animal_humanoid animated_skeleton aquatic aquatic_humanoid arachnid armor arthropod asgore_dreemurr asriel_dreemurr beard blue_body blue_fur bone boss_monster_(undertale) bovid burgerpants caprine castle clothed clothing container crown cup dessert distracting_watermark electronics elemental_creature eyewear facial_hair fangs female fire fire_creature fish fish_humanoid flower food frisk_(undertale) fur ghost glasses goat grillby group hat headgear headphones headwear holding_container holding_cup holding_object horn humanoid ice_cream lagomorph leporid lizard long_ears lying machine male mammal mettaton mettaton_ex midriff muffet napstablook nicecream_man pankax papyrus_(undertale) pasta pastry petals pie plant qc_(undertale) rabbit reptile robot sans_(undertale) scalie sitting skeleton spaghetti spider spirit stripes tea_cup teapot teeth text text_on_clothing text_on_hat text_on_headgear text_on_headwear toriel undead undertale undertale_(series) undyne watermark white_body white_fur

ambiguous_gender ambiguous_penetrated android animated animated_gif digital_media_(artwork) duo erection eyes_closed femboy genitals hotlegmeme loop low_res machine male male/ambiguous male_penetrating male_penetrating_ambiguous mettaton mettaton_ex not_furry oral penetration penis robot sex short_playtime solo_focus undertale undertale_(series)

aaron_(undertale) abs absolutely_everyone absurd_res alphys anthro aquatic arachnid armor arthropod asgore_dreemurr asriel_dreemurr asriel_dreemurr_(god_form) beard biceps big_breasts blonde_hair bone boss_monster_(undertale) bovid bratty_(undertale) breasts burgerpants canid canine cape caprine catty_cattenheimer chara_(undertale) clothing colored_fire cubesona dogressa elemental_creature elemental_humanoid english_text eyewear facial_hair felid female fire fire_creature fish flower flowey_the_flower frisk_(undertale) fuku_fire gaster gerson ghost glasses goat green_fire grillby group hair hat headgear headwear heart_symbol hi_res horn human humanoid lagomorph large_group leporid lineup male mammal melee_weapon mettaton mettaton_ex model_sheet muffet muscular muscular_male napstablook nipples papyrus_(undertale) pecs photoshop_flowey plant qc_(undertale) rabbit reptile robe sans_(undertale) scalie shyren skeleton smile spider spirit sword tem temmie_(undertale) text text_on_clothing text_on_hat text_on_headgear text_on_headwear thick_thighs toriel turtle undertale undertale_(series) undyne weapon

2017 aimf0324 alphys animal_humanoid animated_skeleton aquatic arachnid arachnid_humanoid arthropod arthropod_humanoid bone digital_media_(artwork) dinosaur fish flowey_the_flower frisk_(undertale) group heart_symbol human humanoid machine mammal mettaton mettaton_ex muffet papyrus_(undertale) prehistoric_species reptile robot sans_(undertale) scalie skeleton soul_(undertale) spider spider_humanoid undead undertale undertale_(series) undyne

2017 absolutely_everyone alphys amalgamate ambiguous_gender animated_skeleton anthro aquatic arachnid arthropod asgore_dreemurr asriel_dreemurr asriel_dreemurr_(god_form) blue_clothing blue_sweater blue_topwear bodily_fluids bone boss_monster_(undertale) bottomwear bovid bratty_(undertale) burgerpants canid canine canis caprine catty_cattenheimer clothed clothing crying delta_rune_(emblem) dessert detailed_background digital_media_(artwork) distracting_watermark dogamy dogaressa doggo_(undertale) domestic_dog duo endogeny eyes_closed eyewear felid female feral fire fish flower flowey_the_flower food frisk_(undertale) froggit fur ghost glasses goat goo_creature grass green_clothing green_sweater green_topwear grillby group hair heart_symbol hi_res horn hug human humanoid large_group light lizard long_ears machine male mammal mettaton mettaton_ex monster_kid muffet multiple_images napstablook open_mouth pants papyrus_(undertale) pastry pattern_clothing pattern_sweater pattern_topwear petals pie pillar plant reptile robot sans_(undertale) scalie shirt skeleton smile snow spider spirit striped_clothing striped_sweater striped_topwear stripes sunlight sweater symbol tears tem temmie_(undertale) topwear toriel tree undead undertale undertale_(series) undyne walkingmelonsaaa water watermark white_body white_fur young

2017 absurd_res anthro clothed clothed_anthro clothed_female clothed_human clothed_male clothing colored comic digital_media_(artwork) english_text eyewear female foxtragic frisk_(undertale) glasses hi_res human lizard long_image male male_human mammal mettaton mettaton_ex reptile scalie tall_image text undertale undertale_(series) undyne

2017 absurd_res ambiguous_gender animated_skeleton anthro blue_clothing blue_jacket blue_topwear bone clothed clothed_anthro clothed_female clothed_human clothed_humanoid clothed_male clothing colored comic digital_media_(artwork) english_text eyewear female foxtragic frisk_(undertale) glasses hi_res human humanoid jacket lizard long_image male male_human male_humanoid mammal mettaton mettaton_ex reptile sans_(undertale) scalie shaded skeleton tall_image text topwear undead undertale undertale_(series) undyne wall_(structure)

16:9 3d_(artwork) 4k absurd_res allstarman big_butt boots butt camera_view clothing digital_media_(artwork) exhibitionism footwear hi_res high_heeled_boots high_heels machine male mettaton mettaton_ex not_furry recording robot shoes solo source_filmmaker_(artwork) undertale undertale_(series) widescreen

anthro black_sclera femboy generation_4_pokemon lagomorph lopunny machine male mammal mettaton mettaton_ex miamaha nintendo pokemon pokemon_(species) robot shiny_pokemon simple_background solo undertale undertale_(series) yellow_eyes

alphys belly big_belly comic english_text female hand_on_belly humanoid machine male mettaton mettaton_ex monochrome octo-risotto orange_and_white robot robot_humanoid scalie text undertale undertale_(series) url

2017 alphys balls black_hair blush bodily_fluids boots clothed clothing cum english_text erection eroticphobia footwear genital_fluids genitals hair hair_over_eye humanoid machine male masturbation mettaton mettaton_ex napstablook not_furry one_eye_obstructed penile penile_masturbation penis robot shoes solo spread_legs spreading text undertale undertale_(series) undyne white_balls

2017 alphys balls black_hair blush bodily_fluids boots clothed clothing cum cum_on_hand cum_on_penis cumshot ejaculation erection eroticphobia footwear genital_fluids genitals hair hair_over_eye humanoid machine male masturbation mettaton mettaton_ex napstablook not_furry one_eye_obstructed orgasm orgasm_face penile penile_masturbation penis robot shoes solo spread_legs spreading undertale undertale_(series) undyne white_balls

2017 absurd_res ambiguous_gender animated_skeleton black_bars bone clothed clothed_human clothed_humanoid clothed_male clothing colored comic digital_media_(artwork) english_text foxtragic frisk_(undertale) hi_res human humanoid letterbox long_image male male_human male_humanoid mammal mettaton mettaton_ex not_furry sans_(undertale) shaded skeleton tall_image text undead undertale undertale_(series)

5_fingers alien alien_humanoid ambiguous_gender android black_hair cartoon_network clothed clothing digital_media_(artwork) duo electronics eyewear female fingers gem gem_(species) gem_fusion hair heart_symbol holding_object humanoid jolliapplegirl larger_female machine mettaton mettaton_ex microphone multi_arm multi_eye multi_limb not_furry open_mouth pink_eyes ribbons robot sardonyx_(steven_universe) simple_background size_difference smaller_ambiguous star steven_universe sunglasses teeth tongue undertale undertale_(series) yellow_background

2017 absurd_res ambiguous_gender animated_skeleton bone clothed clothed_human clothed_humanoid clothed_male clothing colored comic digital_media_(artwork) english_text foxtragic frisk_(undertale) fully_clothed fully_clothed_humanoid fully_clothed_male glowing glowing_eyes hair hi_res human humanoid long_image machine male male_human male_humanoid mammal mettaton mettaton_ex robot sans_(undertale) skeleton tall_image teeth text undead undertale undertale_(series)

2017 belly big_belly digital_drawing_(artwork) digital_media_(artwork) greyscale hair hand_on_belly hi_res machine male mettaton mettaton_ex monochrome not_furry pregnant pregnant_male robot simple_background smile solo theannoyingnpc undertale undertale_(series)

absurd_res ambiguous_gender brown_hair clothing comic english_text footwear frisk_(undertale) hair heart_symbol hi_res high_heels human lips long_image machine mammal mettaton mettaton_ex pink_eyes pink_lips question_mark robot shoes sweater tall_image text topwear undertale undertale_(series) unknown_artist

2017 absurd_res ambiguous_gender black_bars clothed clothed_human clothed_male clothing colored comic digital_media_(artwork) english_text foxtragic frisk_(undertale) fully_clothed fully_clothed_human fully_clothed_male hi_res human humanoid letterbox light lighting long_image machine male male_human male_humanoid mammal mettaton mettaton_ex robot robot_humanoid shaded tall_image text undertale undertale_(series)

alphys animated_skeleton annoying_dog_(undertale) anthro aquatic asgore_dreemurr asriel_dreemurr beard bone boss_monster_(undertale) bovid canid canine canis caprine castle crown cutlery delta_rune_(emblem) domestic_dog elemental_creature facial_hair female fish floating flora_fauna flower flowey_the_flower fork frisk_(undertale) ghost goat group headgear human humanoid kitchen_utensils lizard machine male mammal mature_anthro mature_female mature_male mettaton mettaton_ex monster_kid napstablook papyrus_(undertale) plant reptile robot rokuyon sans_(undertale) scalie shovel skeleton spirit symbol tools toriel tree undead undertale undertale_(series) undyne watering_can

2017 absurd_res ambiguous_gender black_bars clothed clothed_human clothed_male clothing colored comic digital_media_(artwork) english_text foxtragic frisk_(undertale) ghost greeting hi_res human humanoid letterbox long_image machine male male_human male_humanoid mammal mettaton mettaton_ex napstablook robot spirit tall_image text undertale undertale_(series)

1:1 2015 ambiguous_gender android ball_gown bent_over big_breasts black_hair breasts brown_hair cleavage clothed clothing crossgender digital_media_(artwork) dress duo eyebrows eyelashes eyeshadow female frisk_(undertale) hair hair_over_eye hi_res huge_breasts human humanoid lil-yellow-kirby lipstick looking_away machine makeup mammal mettaton mettaton_ex musical_note musical_symbol not_furry one_eye_obstructed purple_eyes robot simple_background size_difference smile solo_focus symbol undertale undertale_(series) white_background ylwkirby

5_fingers big_breasts bikini black_hair blowing_bubble_gum boots breasts bubble bubble_gum candy cleavage clothed clothing crossgender curvy_figure dessert digital_media_(artwork) eyewear female fingers food footwear glasses gloves gum hair hair_over_eye hand_on_hip handwear hi_res humanoid inflating legwear lipstick machine makeup mettaton mettaton_ex navel nipple_outline not_furry one-piece_swimsuit one_eye_obstructed robot shirt shoes short_hair simple_background skimpy slb sling_bikini solo standing swimwear thick_thighs thigh_highs topwear two-piece_swimsuit undertale undertale_(series) voluptuous white_background wide_hips

boots clothing essien footwear hi_res high_heeled_boots high_heels josie_sweet lagomorph leporid male mammal mettaton mettaton_ex pose rabbit shoes solo tail undertale undertale_(series)

2016 5_eyes 5_fingers absurd_res accessory ahegao anal anal_penetration android anthro aquatic arachnid arthropod bdsm blush bondage bone bound bow_ribbon breasts cunnilingus dialogue digital_drawing_(artwork) digital_media_(artwork) duo english_text erection eye_patch eyewear fellatio female female_pov femboy fingers first_person_view fish flower flowey_the_flower genitals haaru hair hair_accessory hair_bow hair_over_eye hair_ribbon hand_holding hi_res human humanoid humanoid_genitalia humanoid_penis humor leg_wrap licking long_hair looking_pleasured machine male male/female male/male mammal mettaton mettaton_ex monochrome muffet multi_eye multiple_images one_eye_obstructed open_mouth oral papyrus_(undertale) penetration penile penis plant ribbons robot sex skeleton speech_bubble spider text tongue tongue_out twin_bows twin_hair_bows undertale undertale_(series) undyne vaginal vines vulva

1:1 android angry black_and_white buckteeth duo elemental_creature eyes_closed flora_fauna flower flowey_the_flower freckles haaru hair hair_over_eye hug machine male mettaton mettaton_ex monochrome not_furry one_eye_obstructed plant robot singing teeth undertale undertale_(series)

android clothed clothing colored container cup haaru hair hair_over_eye holding_container holding_cup holding_object humanoid laugh machine male meme mettaton mettaton_ex not_furry one_eye_obstructed parody robot robot_humanoid solo undertale undertale_(series)

2:3 android angry animated_skeleton anthro asgore_dreemurr blonde_hair bodily_fluids bone boss_monster_(undertale) bovid caprine cellphone clothed clothing comic comic_sans crying dialogue digital_media_(artwork) electronics elemental_creature english_text fangs flora_fauna flowey_the_flower frisk_(undertale) hair hi_res home-cooking horn human humanoid machine mammal mettaton mettaton_ex papyrus_(undertale) phone plant reptile robot sans_(undertale) scalie skeleton smile sweat tears teeth text tongue tongue_out toriel undead undertale undertale_(series) undyne

2017 anal anal_penetration balls blush butt clothed clothing digital_media_(artwork) duo erection femboy genitals hair heart_eyes heart_symbol hi_res human humanoid japanese_text machine male male/male male_penetrated male_penetrating male_penetrating_male mammal mettaton mettaton_ex minnnaorenoyome not_furry open_mouth penetration penis robot sex smile soul_sex text translated undertale undertale_(series)

absurd_res anthro armpit_hair asgore_dreemurr atlantart beard biceps blonde_hair body_hair boss_monster_(undertale) bovid caprine duo english_text facial_hair flexing hair hi_res horn machine male mammal mature_anthro mature_male mettaton mettaton_ex musclegut muscular muscular_male robot simple_background sketch solo_focus text undertale undertale_(series)

2017 animate_inanimate balls black_hair blush bodily_fluids cum cum_in_mouth cum_inside digital_media_(artwork) disembodied_penis duo erection eye_roll eyelashes genital_fluids genitals grey_background hair heart_symbol hi_res human ladypot limbless lips lipstick machine makeup male male/male mammal mettaton mettaton_ex not_furry oral penis robot sealguy simple_background tears undertale undertale_(series) vase

2017 animate_inanimate black_hair blush bodily_fluids digital_media_(artwork) eyelashes grey_background hair hair_over_eye heart_symbol ladypot limbless lips lipstick machine makeup male mettaton mettaton_ex not_furry one_eye_obstructed robot sealguy simple_background solo sweat undertale undertale_(series) vase

alphys animated_skeleton aquatic bone doll electronics english_text fish frisk_(undertale) group human lizard machine mammal melee_weapon meme mettaton mettaton_ex microphone monochrome papyrus_(undertale) pitchfork polearm reptile robot sans_(undertale) scalie skeleton spear text tools undead undertale undertale_(series) undyne weapon

2015 absurd_res angry animal_humanoid aquatic aquatic_humanoid arachnid arthropod digital_media_(artwork) eye_patch eyewear female fin fish fish_humanoid group hair hi_res humanoid line_art machine mettaton mettaton_ex muffet nebularum open_mouth ponytail robot sharp_teeth short_hair simple_background smug spider teeth tongue tongue_out undertale undertale_(series) undyne white_background

absurd_res alphys ambiguous_gender animated_skeleton aquatic asgore_dreemurr asriel_dreemurr beard bone boss_monster_(undertale) bovid cape caprine child clothed clothing delta_rune_(emblem) elemental_creature eye_patch eyewear facial_hair female fish flora_fauna flowey_the_flower frisk_(undertale) glasses group hi_res horn human humanoid lizard machine male mammal melee_weapon mettaton mettaton_ex monkeykm moomin papyrus_(undertale) plant polearm red_eyes reptile robot sans_(undertale) scalie simple_background skeleton standing stripes symbol the_moomins toriel undead undertale undertale_(series) undyne weapon young

2015 alternative_fashion android animal_humanoid animated_skeleton arachnid arachnid_humanoid arthropod arthropod_humanoid black_hair black_tie_(suit) bone clothed clothing curtains drag_(fashion) drag_king dress eyewear fangs female goth gothic_lolita grey_body grey_skin group hair hair_over_eye hand_fan hat headgear headwear humanoid j-fashion lolita_(fashion) machine male mettaton mettaton_ex muffet multi_limb one_eye_obstructed papyrus_(undertale) perky_goth robot rotodisk scarf skeleton smile spider_humanoid suit sunglasses teeth top_hat undead undertale undertale_(series) victorian_goth

2016 alternate_universe ambiguous_gender cape castle child classy clothing crown curtsey dress duo eyes_closed flower frisk_(undertale) headgear hi_res human machine male mammal mettaton mettaton_ex not_furry plant robot rose_(flower) rotodisk royalty smile smirk suit tiara underkeep undertale undertale_(series) young

2015 6:5 alphys ambiguous_gender animated_skeleton anthro armless asgore_dreemurr beard blonde_hair bone boss_monster_(undertale) bovid caprine clothing crossover facial_hair female fur glistening group hair hi_res horn kill_la_kill long_ears machine mako_mankanshoku male mammal melee_weapon mettaton mettaton_ex monster_kid papyrus_(undertale) reptile robot ryuko_matoi sans_(undertale) satsuki_kiryuin scalie school_uniform siqlyprince skeleton sparkles studio_trigger sword tem temmie_(undertale) toriel undead undertale undertale_(series) undyne uniform weapon white_body white_fur

2017 andromorph andromorph/male anthro asgore_dreemurr beard blonde_hair blush bodily_fluids boss_monster_(undertale) bound bovid caprine collar crossgender digital_media_(artwork) dongoverlord duo facial_hair femboy genitals hair hair_over_eye heart_symbol horn intersex intersex/male long_ears machine male mammal mature_anthro mature_male mettaton mettaton_ex mta_crossgender mti_crossgender nipples nude one_eye_obstructed penetration penis robot soul sweat undertale undertale_(series) vaginal vaginal_penetration vein veiny_penis

2017 3d_(artwork) big_breasts big_butt breasts butt crossgender digital_media_(artwork) female hi_res looking_at_viewer machine mettaton mettaton_ex not_furry open_mouth robot solo source_filmmaker_(artwork) thick_thighs undertale undertale_(series) uwotinfokm8 wide_hips

2017 3d_(artwork) big_breasts big_butt breasts butt crossgender digital_media_(artwork) female hi_res humanoid looking_at_viewer machine mettaton mettaton_ex not_furry open_mouth robot solo source_filmmaker_(artwork) thick_thighs undertale undertale_(series) uwotinfokm8 wide_hips

2017 alphys alternate_species ambiguous_gender animated_skeleton annoying_dog_(undertale) aquatic asgore_dreemurr avimedes beard bird's-eye_view black_hair black_sclera blep blonde_hair blue_body blue_clothing blue_topwear blush bodily_fluids bone bottomless brown_hair brown_tail canid canine canis chara_(undertale) clothed clothed_feral clothing colored_fire crossover crying curved_horn cutie_mark digital_media_(artwork) digitigrade distracting_watermark domestic_dog duo_focus ear_frill ears_back earth_pony elemental_creature equid equine eye_contact eye_patch eyelashes eyes_closed eyewear facial_hair female femboy feral fire fire_creature fish flora_fauna flower flowey_the_flower frill_(anatomy) frisk_(undertale) frown fuku_fire glasses green_fire grey_body grillby group hair hasbro heart_(marking) heart_symbol hi_res high-angle_view horn horse hybrid kemono light lighting long_hair looking_at_another looking_at_viewer looking_up lying male mammal markings membrane_(anatomy) membranous_frill mettaton mettaton_ex monster_kid multicolored_clothing multicolored_topwear my_little_pony mythological_creature mythological_equine mythology napstablook no_pupils on_side open_mouth outline papyrus_(undertale) pattern_clothing pattern_topwear pince-nez pink_clothing pink_topwear pivoted_ears plant ponification pony quadruped red_eyes red_hair sans_(undertale) scarf shadow short_hair skeleton sleeping smile striped_clothing striped_topwear stripes tail tears tongue tongue_out topwear toriel translucent translucent_body two_tone_clothing two_tone_topwear undead undertale undertale_(series) undyne unicorn unicorn_horn vertical_bar_eyes watermark white_body white_horn yellow_body yellow_eyes

1:1 absurd_res ambiguous_gender bite biting_lip biting_own_lip featureless_crotch hair hair_over_eye hi_res looking_at_viewer machine mettaton mettaton_ex not_furry one_eye_obstructed rat_bastard robot self_bite slightly_chubby smile solo spread_legs spreading thick_thighs undertale undertale_(series)