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Aerofighters Assault

Change Colours - On the plane select screen press the R button to change the colour scheme of your plane.

Secret Plane  - On the title screen press C-Left, C-Down, C-Right, C-Up, C-Left, C-Right and C-Down to access a secret plane.

Aerogauge

Play As An N64 Controller - Complete a time attack race in any time that ends with .64 seconds.

All Star Baseball '99

20 Players - Enter PRPPAPLYR on the main screen

Big Head Mode - Enter GOTHELIUM on the main screen

Alien Stadium And Team - Enter ATEMYBUIK on the main screen