if youre emulating, that will be a problem.
because it is anti-piracy rigged.
without a patch or a code, it will hang there and at the cathedral. fortunately for you, i dont let my siblings anywhere near my ds since they busted one of my carts (new super mario world i shall miss you). so instead they emulate. they like ct too, so they downloaded the rom (technically legal because i own it) and play it on an emulator. they have the code, and it is:
0204E334 E3A00000
0204E338 E12FFF1E
0204E694 E3A00000
0204E698 E12FFF1E
it works with action replay i think. whatever it does, it has its own special name in their cheat folder and it makes it work for their no$gba emulator. but do me a favor?
go buy it.
it will save you time and money and a potential lawsuit (not really but you never know).