Sound test
Win any tournament with an adult pet. A new icon will
appear above your pet's A symbol will appear above your pet on
the statistics screen. A music mode selection will now appear
on the options screen. Select it for options for a sound test,
sound effects test, sound test speed, and a gallery of all pets.
Mimitchi
Feed a pet that hatched from a black egg only carrots.
The pet will transform into Mimitchi after turning six.
Recommended color palette
Press [Right] + [A] at the Game Boy logo
when playing this game on a Game Boy Color system.