>>38324832Both cases can have internal explanations within their own lines as to what is happening.
Graveler is an in-between of Geodude and Golem. It retains Geodude's proportions, while having a smaller face and new arms and legs to give it Golem's proportions as well. That was after in was retconned to have six limbs. It originally didn't have legs, but instead just two pairs of arms that would be replaced with a pair of arms and legs.
Machoke has stretch marks from its arms getting large, but it could be explained that its from its arms about to split into two pairs of arms as well.
