User blog comment:MarioKero345/My Ideas of Pichu's return in SSB4/@comment-6684591-20151101023846

Here is a moveset in which Pichu is declined, having unique special moves and having some new standard attacks, some of which are based off of other moves Pichu can use in the Pokémon games.

http://supersmashbrosfanon.wikia.com/wiki/SSBR:_Pichu

I think with this moveset and attributes, Pichu would be a fresher veteran fighter.