Bonus Courses?
 

I found these codes for the bonus courses, but they unlock other things. In parenthesis I'll put what it really did. *Note these are for GC.

Bonus Stage 1 - LSMMS (something happended to raph, prob his bandana)
Bonus Stage 2 - SSLDM (Leo has unlimited shuriken)
Bonus Stage 3 - MSSLD (Mikey powers up, and recovery items increse)
Bonus Stage 4 - SRLMD (Casey jones mode)
Bonus Stage 5 - LSDRM (Playmates database is unlocked)

I don't know what the bonus courses would be, but these codes appear not to work. If anyone has any info on real codes or where they're are no bonus courses, please post.

where did u get thse codes at? if u got them at game FAQS then ur in trouble. i love thats ite to death but for TMNT they put all the wrong codes in the wrong consol ver of the games. each game has its own ver of every code except the costume code. i say just get the strat guide if u want the true codes. i could look them up and type them myself but thats to much work.

The Bonus courses are for Raph's bike stage on the GBA version.

So are there not any bonus courses for the platforms? Or are there, but I don't have the codes?

Well I just checked IGN and according to them, there aren't any bonus courses for GC, so now my question is answered. But now if anyone has the GBA version, could you let me know what each of the bonus courses are?

the bonus courses are for the GBA ver only. my lil bro has it. all they are is a raph bike riding mini game. thats it. its an extended ver of his bkie level in the game there 4 courses? each 1 is harder then the last and longer. it gets boring after a while. could of added alot more bonus type stuff/games onto this game,

Oh I see. Well thanks though.