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2015 5_fingers alalampone amalgamate ambiguous_gender black_background black_hair clothed clothing digital_media_(artwork)duo femboy fingers ghost goo_creature goo_transformation hair humanoid low_res machine male melting merging mettaton mettaton_ex multi_eye napstablook nightmare_fuel not_furry robot simple_background spirit transformation undertale undertale_(series)what_has_science_done