Play Twin Series 4 - Hamu Hamu Monster EX & F Puzzle Hamusuta (J)(Independent) Online

I picked up Twin Series 4 - Hamu Hamu Monster EX & F Puzzle Hamusuta as a Japan-exclusive Game Boy Advance title from an independent developer. It's one of those quirky, lesser-known releases that slipped under the radar during the GBA's lifespan, blending two distinct modes into a single cart. The game doesn't have the backing of a major publisher, but it has a certain charm that stands out among more polished contemporaries.

You alternate between two main modes: in one, you raise and evolve round, squeaky monsters by feeding them; in the other, you tackle a fast-paced puzzle game where grinning blobs drop from above while small onlookers cheer you on. The objective is straightforward—care for your creatures and clear puzzle stages—but the constant shift in pace keeps things interesting. It's not overly difficult, but the puzzle half can get frantic. Playing it feels like bouncing between a pet simulator and an arcade session, and the odd combination somehow works.