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anthro armband biceps black_background bowser butt collar darkgem eyebrows fangs hair hi_res horn koopa looking_back male male_anthro mario_bros neon neon_lights nintendo no_pupils nude nude_anthro nude_male rear_view reptile scalie shell signature simple_background solo spiked_armband spiked_collar spiked_shell spikes spikes_(anatomy)teeth thick_eyebrows turtle