Spyro Orange: The Cortex Conspiracy [GBA]

Sheep enemies:
Press L + R at the "Mode" menu, then enter SH33P as a code.

Orange game:
Press L + R at the "Mode" menu, then enter SP4RX as a code.

Purple game:
Press L + R at the "Mode" menu, then enter P0RT4L as a code.

Orange Spyro:
Press L + R at the "Mode" menu, then enter SPYR0 as a code. Note: The last character is the number zero.
Information in this section was contributed by lazykid123.

Flying sheep instead of flame:
Press L + R at the "Mode" menu, then enter B41S0KV as a code.

Crash Party USA mini-game:
Hold L + R and turn on the Game Boy Advance.

Alternate credits:
Successfully complete story mode, then select "Credits" from the main menu.

100 Gems:
Press L + R at the "Mode" menu, then enter V1S10NS as a code. You will get 100 Gems to help purchase the full set of collector cards. Note: This can only be used once in each saved game.