From Swirlvision:
New information regarding Sega’s upcoming pinball game for Gameboy Advance! Sonic Pinball Party will feature the familiar cast from the Sonic universe, like Tails, Amy, Dr. Robotnik (Eggman), and even Chaos! Also, characters from Sonic Team’s other hits, like Samba (from Samba de Amigo) and Nights himself will be making an appearance.
The game will even have music variations from familiar titles: Phantasy Star Online, Samba de Amigo, Burning Rangers, and more!
Link-up compatibility with Sonic Advance 2 and the upcoming Sonic Adventure DX for Gamecube round out the goodies.
Sonic Pinball Party is due for release in Summer.
Source: Swirlvision