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Nintendo 64 - All-Star Baseball '99 cheats

Show Baseball trails:
While playing hit B, Left, Up, Right, Down, B, A, Left, Left

Big baseball:
While playing hit Up, Right, A, Left, Left, B, Up, Left, Left

2 dimensional players:
While playing hit Up, Right, A, Right, A, Down, Down, Up, Up, Down 

Fat/thin players:
While playing hit A, Left, Left, Right, Up, B, Right

Big heads/feet/bat:
While playing hit Left, A, Right, Down, B, A, Left, Left

Cheat codes:
Enter the following cheat codes at the cheat menu:
Show baseball trails: Enter "GRTBLSFDST"
Big baseball: Enter "BBNSTRDS
2 dimensional players: Enter "PRPPAPLYR"
Fat/thin players: Enter "ABBTNCSTLO"
Big heads/feet/bat: Enter "GOTHELIUM"
Unlock alien stadium and team: Enter "ATEMYBUIK"

Unlock credits option:
Hit R, A, Z, R, C Right, A, B at the title screen.

Read programmer messages
Hit C-Up, R, B, B at the title screen.

Extra pitches
Play in arcade mode. Hold Z or L during game play.