The new screenshot of the day for Super Smash Bros. development shows off Palkia emerging from a Pokeball. Masahiro Sakurai also had this to say on the Miiverse page for the game:
Palkia appeared in the Spear Pillar stage of the previous game…but now it’s coming out of a Poké Ball?! Here’s Palkia’s signature move, Spacial Rend!
What do you want to see next in the development screenshots?