Hamster Club 4 is a Game Boy Advance title, likely focusing on hamsters. Considering its title, it might be a simulation game, allowing players to care for and interact with virtual hamsters, or perhaps it could be a puzzle game.  More information is necessary to confidently determine its genre, gameplay mechanics, and the development team behind it.

Hamster Club 4 (J)(Rising Sun)

Hagane no Renkinjutsushi - Omoide no Soumeikyoku (J)(Caravan)