If the Wii is capable of disc swapping, then I say go for it. However, I think Monster Rancher should stick to it's Sony roots. PS3 is the only one I know that can swap discs without going to the main menu. I like the promise of Monster Rancher on Wii. By that I mean you could further immerse yourself into training your monster personally. Say, do movements to instruct your monster to train in certain ways. Or pet him when he succeeds, or lightly slap him if he fails.
