Teenage Mutant Ninja Turtles 3: Mutant Nightmare cheats and cheat codes for Gamecube

Cheats:
Type the following at the password screen:
Effect - Password
Enemies double attack: MSRLSMML
Enemies Double Defense: SLRMLSSM
Gives you Donatello's level 2 Dino Armor scroll: MSSRDLMR
Gives you Donatello's level 3 Dino Armor scroll: DLRLDMSR
Gives you Leo's level 2 Dino Armor scroll: RLDMRMSD
Gives you Leo's level 3 Dino Armor scroll: MLMSRRDS
Gives you Michelangelo's level 2 Dino Armor scroll: SRDMMLRS
Gives you Michelangelo's level 3 Dino Armor scroll: LSMRRDSL
Gives you Raphael's level 2 Dino Armor scroll: DRMDLLRS
Gives you Raphael's level 3 Dino Armor scroll: SMRDRSLD
Invincibility: MDLDSSLR
Maximum Ougi: RRDMLSDL
No healing items: DMLDMRLD
No more shuriken: LLMSRDMS
Single hit kill: LDMSLRDD
Sushi Party: SLLMRSLD
Unlimited Shuriken: LMDRRMSR
Unlocks a cut-scene of Casey & April: RMLDDSML

Unlock Free Battles Arenas:
How to Unlock - Unlockable
Win Mission 16 Episode 1 - Free Battle 4
Win Mission 5 Episode 2 - Free Battle 5
Win Mission 1 Episode 1 - Freebattle 1
Win Mission 5 Episode 1 - Freebattle 2
Win Mission 10 Episode 1 - Freebattle 3

Unlock Score Attack:
Win Mission 6 Episode 1

Unlockables:
TMNT 2: Turtles In Time arcade game
Finish all 16 missions in Episode 1

Time Attack mode: Finish Score Attack mode
Nightmare episode: Finish Episodes 1 & 2 & 3
Last Nightmare episode: Finish all Nightmare episodes
Score Attack mode: Finish Mission6/Episode1
Free Battle Arena #1: Finish Mission1/Episode1
Free Battle Arena #2: Finish Mission5/Episode1
Free Battle Arena #3: Finish Mission10/Episode1
Free Area 12 and 13: Finish the last Nightmare episode
Ultimate Turtle Scroll: Finish Free mode Area 12 and 13
Movie Viewer: Collect any DVD
April O'Neil movie clip: Pick up the DVD in Free Battle Mission 1
Fugitoid movie clip: Pick up the DVD in Free Battle Mission 3
Hover Board movie clip: Pick up the DVD in Mission 5 Episode 1
Traximus movie clip: Find the DVD in Mission 8 Episode 1