GBA connectivity?
 

So is there any and what does it do?

I'm considering whether to get it on PS2 (which I have) or Gamecube (which I am considering getting).

Is it just the Casey Jones Mode? http://www.thetechnodrome.com/forums...pic.php?t=6285

I beileve there is a Splinter Mode too

and using the GBA, u get to use the passwords that the GBA gives you, to unlock stuff on the Gamecube one.

Well they do unlcok the racing mode on GBA too.

There's one more reason why the Game Cube version is better. Long live NINTENDO! :D

Whats the racing mode?

You dint try it? When I finshed the game on easy, I tried what the password does, the GBA game has a pasword menu. A new menu opnes, and there you can choose wich of the mini games to play. The easy mode only opened the Raph VS Casey race. I believe the other password opens more of those, but I haven't finsihed the game on Normal yet... Damn elevator!

are the special modes unavailable on PS2 etc?

That is, if you CARE about that sort of thing...

Apparently most of us do... And this topic is ABOUT the GBA connectivity...

or as one guy I know might say:
quit being a troll

This opens stuff up on the GBA version, correct? Not the GC version?

Also, Splinter & Casey modes are available on PS2 as well.

Since when?

No, this opens up stuff on NGC.

And, since when?

The password DO open a racing mode in the GBA game.