Hamtaro: Ham-Ham Games

Free play mode:
Successfully complete the game.

Hamigo Card File:
Successfully complete the game.

Alternate ending sequence:
Collect all entries in the Hamigo Card File.

Silver Rainbow Cup:
Successfully complete the game two times.

Alternate events:
Use the following trick to complete two events in different ways. In Free Play or in the Tournament, hold Select + L + R while choosing "Play", "Practice", or "Enter". Continue holding those buttons until the entire start of the 100m Dash or the Hurdles to run backwards or have Snoozer tied to Boss's back, respectively.
Information in this section was contributed by Cory Klingsporn.

Hint: Costume locations:
Information in this section was contributed by Lyndsey Graham.

Apple: Lawn. Climb a tree to the right of the entrance.

Bird: Pool. Jump on a mushroom on the right. Press A on the cloud that you land on.

Dog: Available at the start.

Frog: In the middle of the game at night, go to athlete's village in Team D'jungles house. They will be in there.

Hippo: In the middle of the game at night, go to athlete's village in Team D'jungles house. They will be in there.

Ladybug: Go to stadium, and up fire truck ladder. There is a lady bug up there.

Lion: In the middle of the game at night, go to athlete's village in Team D'jungles house. They will be in there.

Monkey: Available at the start.

Starfish: Beach: Look for a starfish.