I am well aware of that, but the Yellow version was based on the TV show, as were a few of the other games. Sure it's possible, but I think it's very very unlikely that stuff derived for/from the anime will end up in brawl, just because of the nature of smash bros games.
I too would like to see the game rocket rather than Jessie and James.
Not much to say on todays update, it certainly did get me to giggle though.