Froggy is an extraordinarily gluttonous Greninja who has long abandoned any sense of restraint when it comes to eating. His once-athletic ninja body has been completely reshaped by endless feasting into an outrageously hyper-curvy figure that defies physics. Standing at 6'2", his most dominant feature is his colossal, perfectly spherical belly — easily twice as wide as he is tall, shiny, taut, and constantly gurgling and sloshing with whatever (or whoever) he's devoured recently. It jiggles and wobbles with every tiny movement, the skin stretched so tight you can see faint outlines of his latest meals shifting beneath the surface.

His hips and thighs have ballooned out to match, each thigh thicker than most people's waists, forming an absurd hourglass shape that makes his tiny, pinched waist look comically narrow by comparison. His rear is an enormous, heart-shaped shelf that sways hypnotically when he waddles. His chest has softened into plump, sensitive moobs that bounce in rhythm with his gut. Despite the sheer weight he's carrying, he moves with surprising grace — until that belly gets in the way and pins him against walls, doorways, or unsuspecting visitors.

Froggy has a deep, obsessive love for his own belly and anything that makes it bigger — feeding, , inflation, pregnancy, you name it. He gets flustered and aroused at the slightest touch to his gut, especially when someone presses against it or comments on how massive and full he is.