A new pal is joining Sonic and pals for Sonic Advance 2!
Sega showed Sonic Advance 2 at the Tokyo Game Show. They also introduced a brand new character to the Sonic universe. Her name is Cream the Rabbit. A translation of this page reveals that Cream is designed for beginner players and her game is easier. She also has a pet Chao at her side. The page also has video and screenshots of Sonic Advance 2.
The Babelfish translation also reveals that Sonic Advance 2 will link up to the GameCube game Sonic Adventure 2 Battle. The link seems similar to Sonic Advance 1, involving a Chao Garden. The title also features link play between up to 4 GBA players with 1 or multiple cartridges.