There aren't any 360 emulators out there. Your best bet is to find the ISO and, hopefully, have files you can use to convert and extract files that contain models.
I think you can actually just browse the ISO itself using the program "Wii Scrubber" and just extract what you what from the whole game. Then you need a program to open those specific files(Kinda like Brawlbox), and export them as a useable format, import the models, (For this last part, look up a tutorial)rig 'em(if not already rigged) and export as a v. 4.1 .dae and import into Brawlbox.
P.S. He said he had the ISO.