It's just occured to me that we're off-topic. If it happens again, th thread will be locked.
Back on topic.
There should be different AI settings, like in Perfect Dark: for example, you could set CPU players to always (or never) use items, always go after the person who KOed them last, always go after whoever's winning, keep as far away from other players as is physically possible, use a lot of long-range attacks (or none whatsoever), shield a lot (or not at all)... and so on, and so forth.