Twin Series 4 - Hamu Hamu Monster Ex and Fantasy Puzzle Hamster Monogatari - Mahou No Meikyuu 1.2.3 are two separate Game Boy Advance games.
Twin Series 4 - Hamu Hamu Monster Ex is a puzzle game where players control cute monsters called "Hamu Hamu" as they navigate through various levels filled with obstacles.
Fantasy Puzzle Hamster Monogatari - Mahou No Meikyuu 1.2.3, on the other hand, is an adventure puzzle game where players take on the role of a hamster exploring magical mazes filled with traps and enemies. The game includes three different mazes to tackle.
