Sonic rolls in to Vita's Super Monkey Ball as DLC

The long wait for a proper Sonic game (on either Vita or PSP) goes on (I'm not counting the Rivals games or the upcoming racer), but the hedgehog is making an appearance in Super Monkey Ball to mark his 20th Birthday.

Not sure if he's directly playable, the free DLC instructions don't make much sense in English, but there he is, just waiting to running after rings at high speed. Come on Sega do the decent thing and put Sonic 4 on the Vita!