Sonic Battle (GBA)

Emerl Combo Cards'
In Emerl's story, go to Central City and go to the sonicteam building and type in these codes, 75619 for Sonic's, OTrOI for Tails', yU3Da for Knuckles', ArmIa for Shadow's, AhnVo for Rouge's, alogK for Amy's, ZAhan for Cream's, tSueT for Gamma's, and EkiTa for Chaos'. If you ask me I would say that Shadow's is the best.

Fly And Get Mini-game
Successfully complete Tails' episode in story mode.

Gerald's Journal
You must beat Story Mode with every character. After this is done you can go back and play the stories again. After beating them, you will get to read part of Gerald's Journal!

Effect - Code

Gerald's Journal entry #1 - Beat Sonic's story again
Gerald's Journal entry #2 - Beat Tail's story again
Gerald's Journal entry #3 - Beat Rouge's story again
Gerald's Journal entry #4 - Beat Knuckle's story again
Gerald's Journal entry #5 - Beat Amy's story again
Gerald's Journal entry #6 - Beat Cream's story again
Gerald's Journal entry #7 - Beat Shadow's story again
Gerald's Journal entry #8 - Beat Emerl's story again

Green Hill Zone Level
Successfully complete story mode with all characters.

Mine Hunt Mini-game
Successfully complete Knuckle's episode in story mode.

Passwords for extra cards
In Emerl's story, go to sonicteam near the highway and type in these cheats

Amy-alogK
Chaos-EkiTa
Cream-ZAhan
E-102-tSuet
Knuckles-yU3Da
Rouge-AhnVo
Sonic-75619

Play As Chaos 0
Defeat Chaos 0 during Emerl's story line.

Play As Gamma
Defeat Gamma during Emerl's story line.

Shadow combo card
In Emerl's story use the following code: ArmIa.

Soniclash! Mini-game
Successfully complete Sonic's episode in story mode.

Speed Demon Mini-game
Successfully complete Shadow's episode in story mode.

Tails Combo Card
In Emerl's story use this code: OTrOI

Treasure Island Mini-game
Successfully complete Amy's episode in story mode.