3d_(artwork) 9:16 alien alien_humanoid animal_humanoid anus balls blue_balls blue_body blue_penis blue_skin breasts cartoon_network clothed clothing crossgender crossover digital_media_(artwork) duo erection female fish fish_humanoid ftg_crossgender fti_crossgender gem_(species) genitals green_body green_skin gynomorph hair hi_res humanoid intersex interspecies marine marine_humanoid monster nipples penis peridot_(gem_species) peridot_(steven_universe) pussy red_hair side_boob simple_background size_difference steven_universe text undertale undertale_(series) undyne url wo262