Sonic Shuffle

Sonic Shuffle is a video game for the Sega Dreamcast and was Sega's answer to the successful Nintendo party game, Mario Party. The game was co-developed by Hudson Soft, who also developed Mario Party.
The story involves Sonic and company getting caught up in a mess in a world land called Maginary World, which they inadvertently stumble upon one day. A villain named Void has shattered the Master Precioustone into many pieces, resulting in chaos in every part of the world. Lumina Flowlight and the rest of Maginary World are counting on Sonic to restore it and bring Illumina back, who mysteriously disappeared after the disappearance of the Precioustone.