Hamtaro: Ham-Hams Unite!

Hamtaro: Ham-Hams Unite! (とっとこハム太郎2 ハムちゃんず大集合でちゅ) is a Hamtaro adventure video game developed by Shogakukan and published by Nintendo for the Game Boy Color handheld video game console. It was first released in Japan on April 21, 2001, and was later released in North America on October 28, 2002, and in Europe on January 10, 2003.

It was the last game officially released for the Game Boy Color in the United States and Europe.

The ham-hams can be hard to get, considering certain things trigger certain emotions that is unique to each ham. At the beginning of the game, a hamster named boss says he needs you to bring (or rather bribe or convince in some cases) back to the clubhouse. He mentions Ham-Chat and teaches it to you before you head off. He gives you a notebook to write it all in, and teaches you a few simple Ham-Chats.