>Makuhita is a yellow bipedal Pokémon that is known for its bulkiness. It has a black chest and round hands that resemble black gloves. It has red circles on its cheeks and slit-like eyes. Its head has a knot, making it resemble a punching bag. Its feet each have two visible toes.
Makuhita looks like a punching bag, which makes sense since it is a fighting-type.
Other than that, Game Freak just wanted it that way.