Sonic Toon - Island Adventure (Japan) (ソニックトゥーンアイランドアドベンチャー) is an action-adventure game developed by Sega and released exclusively for the Nintendo 3DS in Japan. The game follows Sonic the Hedgehog and his friends as they explore an island filled with puzzles, secrets, and enemies. Players must navigate through levels, collect items, and battle bosses to progress through the game. The game features a variety of characters, including Tails, Knuckles, and Amy, as well as new characters such as Big the Cat and the mysterious Dr. Robotnik. Players can switch between characters to use their unique abilities to progress through the game. The game also features a two-player mode, allowing two players to join forces to complete levels. Sonic Toon - Island Adventure is a fast-paced and exciting game that will challenge players to explore the island and uncover its secrets.