Toxicroak is based on the poison dart frog. Its appearance is much more humanoid than Croagunk, though it still maintains the appearance of an oversized bipedal frog. Its main body colour is a dark blue or teal. Its head bears a gently-upward curling spike which seems to be a part of the skull, as it is covered in the same colour skin as the rest of its body. Toxicroak's eyes are bright yellow, sinister and intimidating, with a small snake-like pupil. Its mouth is not much different from Croagunk's; it still looks as though it is wearing a mouth-guard, with its red upper lip curling upward at the ends in a very intimidating manner. Underneath its chin is a bulbous red vocal sack. Its arms are shaped much like those of an Elekid, though not as thick and instead of three claws, Toxicroak has three fingers and one large red claw on the back of each hand. Its forearms have two black rings encircling them. Its legs are muscular and seem to be adapted for speedy attacks. It has three toes on its feet, with the middle toe red on each foot, and a sharp spike jutting out of its heels. Underneath the pelvic area Toxicroak has two white horizontal lines, which have moved down from Croagunk's chest. Toxicroak has thick black lines running down the sides of its body and surrounding its limbs, making them seem as if the limbs are detachable. The black lines go up into its face and surround the eyes before meeting in the middle of its snout, just above the upper lip.