Treasure Island

Treasure Island is the fourth unlockable minigame in Sonic Battle and is unlocked by beating Amy's episode in Story Mode.

The minigame plays the most similar to the main game, comparatively. Players are given a standard 2.5D map and must look for the most hidden treasure in time, before one another. This mingame is only playable in multiplayer mode across and up to four different Game Boy Advance devices.