I've exported the bowser jr. model to obj along with his bones, but I don't know how to re-import them into the game. Any ideas?

when you click on a file in the rom file browser, there is a replace button. you have to name the file the same as the original file though
_________________________
Here's my MvL Hacking thread

Consider joining the NSMB DS Hacking Discord Server!

#HakingNoMore

Will that work with an .obj?

EDIT: I tried it with an obj and I can confirm it does not work.
I did find a way via MKDS Course editor to .nsbmd, however, because the animations aren't correct, the model comes out as a sideways t-posed model.

Edit: Ninja'd
No
Try using MKDSCM to convert obj to nsbmd.
IIRC you wont have any animations but it's a good starting point.

Otherwise use Maya/3DSMax and Nitro tools if you want the model to be animated and the like.
_________________________
"I strikingly thought you would know how but it clearly seems you have no knowledge of hacking" - MiiU 2017

Where can I get nitro tools? I have maya and 3DSMax

While it's been so long since Nintendo released them, it's still illegal to upload them or tell people where to download them. So I'm affraid we cannot help you with that.

Anyway, the plugins are in some sort of toolpack made by Nintendo, which is called the Nitro SDK. If you didn't know this already, it might help you looking further for it.

Thanks, I'll scope it out.

EDIT: I found something called "DevKitPro", which is apparently an open source Nintendo dev kit for every system, anybody know of it? Is it any good?

DevKitPro is necessary for ASM hacking, so basically everyone who uses or codes ASM hacks knows it. Have you read How ASM hacks are setup? It is very useful.
_________________________
Check out these awesome hacks! Beyond DS is now my major hack!

I'll take a look at it, thanks

EDIT: Okay, so I downloaded devkitPro, but idk how to use what it has for 3d modeling.