Actually, dot3 BM is not GC forté, and the Xbox/PC version does use pixel shaders, which could not be "ported" to the GC (Effects should be recoded from scratch), there's also the difference in amount of RAM between the Xbox and the GC, all in all, that means UbiSoft would have to do an almost 100% GC version.jarrod said:(which will probably use more hardware specific framebuffer effects in place of normal mapping and other techniques GC is fully capable of).
This scenario is possible, but I doubt they'd do it this way when a cross developed PS2/GC version + one or two "bonus" would do the trick just as well (Salewise).