>>43441266Raichu is somewhat popular in VGC, so I doubt GF will be inclined to change it. The rest of the line is likely to stay as is. Besides, Light Ball is already above and beyond what most NFEs gets for buffs.
Wigglytuff actually has a lot that could be done with it, and not even in a non-realistic way. Fluffy is a easy ability to fit on it, as would Punk Rock (or a clone with a more fitting name, like Libero/Protean). Beyond that a BST buff wouldn't be completely out of the question, though unlikely given it was given a (meager) buff not that long ago already.