It is only limited by the program or operating system that is used. The specification for the UPS patch format do support any file size. The UPS file patch format was designed to be a direct replacement for IPS. I deleted all the battle mode trainers to save space so you can only play these on Story two helped a lot in terms of researching various elements of colosseum so it feels appropriate to at least give some credit. Pokemon XG: NeXt Gen - ROM hacks - Project Pokemon Forums. Use a UPS patcher to apply this patch to a clean US version of Pokemon Colosseum. I've played through most of it a few times myself and it should be pretty stable.
I don't have plans to work on colosseum for a while but I thought I'd release what I'd done for anyone who may be interested.
I started it long ago before I knew much about hacking so it's not drastically different but it does contain a few new moves, all new trainer and shadow pokemon and new TMs. Also, I was previously working on a Hack version of Pokemon Colosseum.
