Cheat Codes (PlayStation 2)
Extra Modes, and Stages:
- April's adventure mode: As Donatello, successfully complete the Ghetto level
- April's Apartment stage: As Donatello, successfully complete the April's Apartment 2 level
- April's melee mode: As Casey Jones, successfully complete adventure mode
- Autumn stage: As Michelangelo, successfully complete The Dojo level
- Casey Jones' adventure mode: As Raphael, successfully complete the Subway level
- Casey Jones' jacket costume: As April, successfully complete her adventure mode
- Casey Jones' melee mode: As Casey Jones, successfully complete adventure mode
- Casey Jones' red shorts costume: As Casey Jones, successfully complete level the Ghetto level
- Dojo Complete stage: As Casey Jones, successfully complete the Turtle's Lair level
- Foot Soldier's adventure mode: As Raphael, successfully complete his adventure mode
- Hun's adventure mode: As Michelangelo, successfully complete his adventure mode
- Hun's melee mode: As Hun, successfully complete his adventure mode
- Monster's melee mode: As Hun, successfully complete the Sewer Canal level
- Sewer Falls stage: As Raphael, successfully complete the Sewer Falls level
- Sewers stage: As Leonardo, successfully complete the Sewers level
- Shredder's adventure mode: As Donatello, successfully complete his adventure mode
- Shredder's gold costume: As Shredder, successfully complete his adventure mode
- Shredder's Palace Exterior stage: As Leonardo, successfully complete The Lab 12 level
- Splinter's adventure mode: As Leonardo, successfully complete his adventure mode
- Subway Stage: As Leonardo, successfully complete the Sparring With Splinter level
- Tech Foot's melee mode: As Foot Soldier, successfully complete adventure mode
- Waterfall stage: As April, successfully complete the Turtle's Lair level
Cheat Codes (GameCube)
Characters In Adventure Mode:
- April: complete the Ghetto [stage 6 top path]
- Casey Jones: complete level 5 Subway
- Hun: beat Mikey's story mode (bottom path)
- Ninja: complete adventure mode with Raphael
- Shredder: complete adventure mode with Donatello
- Splinter: complete adventure mode with Leonardo
Melee Mode Characters:
- April: Beat Casey's adventure mode
- Casey: Beat Casey in his adventure mode
- Casey Jacket: Beat Splinter's 6th Mission Subway (Top Path)
- Gold Shredder: Beat Shredders Adventure (Story Bottom Path)
- Hun 2: Finish Hun's Adventure story
- Large Foot: Beat Foot Mission 6 Garden
- Monster: Beat Hun's Mission 10 Sewer Canal
- Oroku Saki: Complete Splinter's Adventure (Bottom Path)
- Tech Foot: Beat Foot's adventure mode
Melee Mode Levels:
Bamboo Level: Beat Splinter's 6th Mission Lakeside Terrace (Bottom Path)
Sewer: Beat Leo's 5th Mission (Sewer)
Subway: Beat Leo's 3rd Mission (Turtles' Lair)
Cheat Codes (Xbox)
April's Swimsuit in Melee Mode: Clear Subway in Splinter's Adventure Mode
Extra Modes and Stages:
- April's adventure mode: As Donatello, successfully complete the Ghetto level
- April's Apartment stage: As Donatello, successfully complete the April's Apartment 2 level
- April's melee mode: As Casey Jones, successfully complete adventure mode
- Autumn stage: As Michelangelo, successfully complete The Dojo level
- Casey Jones' adventure mode: As Raphael, successfully complete the Subway level
- Casey Jones' jacket costume: As April, successfully complete her adventure mode
- Casey Jones' melee mode: As Casey Jones, successfully complete adventure mode
- Casey Jones' red shorts costume: As Casey Jones, successfully complete level the Ghetto level
- Dojo Complete stage: As Casey Jones, successfully complete the Turtle's Lair level
- Foot Soldier's adventure mode: As Raphael, successfully complete his adventure mode
- Hun (2's) melee mode: As Hun, successfully complete his adventure mode
- Hun's adventure mode: As Michelangelo, successfully complete his adventure mode
- Monster's melee mode: As Hun, successfully complete the Sewer Canal level
- Sewer Falls stage: As Raphael, successfully complete the Sewer Falls level
- Sewers stage: As Leonardo, successfully complete the Sewers level
- Shredder's adventure mode: As Donatello, successfully complete his adventure mode
- Shredder's gold costume: As Shredder, successfully complete his adventure mode
- Shredder's Palace Exterior stage: As Leonardo, successfully complete The Lab 12 level
- Splinter's adventure mode: As Leonardo, successfully complete his adventure mode
- Subway Stage: As Leonardo, successfully complete the Sparring With Splinter level
- Tech Foot's melee mode: As Foot Soldier, successfully complete adventure mode
- Waterfall stage: As April, successfully complete the Turtle's Lair level
Cheat Codes (PC)
Unlockable:
- April's Adventure Mode: Beat the Ghetto level with Donatello
- April's Apartment Stage: Beat April's Apartment 2 Level with Donatello
- April's Melee mode: Beat Adventure Mode with Casey Jones
- Autumn Stage: Beat the Dojo Level with Michelangelo
- Casey Jones' Adventure Mode: Beat the Subway mode with Raphael
- Casey Jones' Jacket Costume: Beat Adventure Mode with April
- Casey Jones' Melee bode: Beat Adventure Mode with Casey Jones
- Casey Jones' Red Shorts Costume: Beat the Ghetto Level with Casey Jones
- Dojo Complete Stage: Beat the Turtle's Lair Level with Casey Jones
- Foot Soldier's Adventure Mode: Beat Adventure Mode with Raphael
- Hun (2's) Melee Mode: Beat Adventure Mode with Hun
- Hun's Adventure Mode: Beat Adventure Mode with Michaelangelo
- Monster's Melee Mode: Beat the Sewer Canal level with Hun
- Sewer Falls Stage: Beat the Sewer Falls level with Raphael
- Sewers Stage: Beat the Sewers Level with Leonardo
- Shredder's Adventure Mode: Beat Adventure Mode with Donatello
- Shredder's Gold Costume: Beat Adventure Mode with Shredder
- Shredder's Palace Exterior Stage: Beat The Lab 12 Level with Leonardo
- Splinter's Adventure Mode: Beat Adventure Mode with Leonardo
- Subway Stage: Beat the Sparring with Splinter Level with Leonardo
- Tech Foot's Melee Mode: Beat Adventure mode with Foot Soldier
- Waterfall Stage: Beat the Turtle's Lair Level with April
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