Backyard Baseball 2006 - Platform: Gameboy Advance

Abner Dubbleplay:
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Get 20 skill certificates for your team. 

Barry Dejay:
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Complete the fielders challenge. 

Dontrelle Willis:
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Enter Bigfish as a coach's name in season mode. 

Jim Thome:
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Earn the pitch shut-out certificate. 

Aquadome Stadium:
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Hit a homerun into two bodies of water. One is Gatorflats and 
the other is Steel Stadium. The Aquadome stadium is all underwater. 

Humongous Memorial Stadium:
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Go to the playoffs. 

Quantum Field:
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Win a Championship season.

Mike Piazza:
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Get two double plays in one game during the season. 

Sammy Sosa:
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Enter Babybear as a coach's name in season mode.