Victini and Xerneas have been confirmed to be support Pokémon in the upcoming Super Smash Bros for the Nintendo Wii U. Masahiro Sakurai (桜井政博), Director of the games, posted on Miiverse that Victini's Victory Star boosts the attack of whoever throws the Poké Ball and also prevents flinching while Xerneas's Geomancy increases the launch power of all fighters, but exceptionally raises it for whoever had the Poké Ball.


Source: https://miiverse.nintendo.net/posts/AYMHAAACAABnUYoA29XTHA