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Gamecube - Scooby-Doo: Mystery Mayhem cheats

Weird Wild West: Safe code:
The three digit safe code in the bank is "1-3-7".
You can found written on the blackboard in the schoolhouse.

Opening the bridge on level 2:
To open the bridge you have to use 4 switches. 
Press switches 1, 2, and 4.

Unlock mini-games:
Find the 5 hidden sandwich ingredients in a stage

Trap The Fake Ghost mini-game: Collect the ingredients in stage 1.
Monster Frenzy mini-game: Collect the ingredients in stage 2. 
Mine Cart mini-game: Collect the ingredients in stage 3.
Trail Bike mini-game mini-game: Collect the ingredients in stage 4.
Spooky Science mini-game: Collect the ingredients in stage 5.