Yeah, the cpu is a douche later on, it's players position themselves perfectly and do pretty much everything without any significant flaws.
But man, I have never played a soccer game more intense and hectic with dangerous and exciting moments, big bursts of laughter, the most amazing kicks, curves and scores than Mario Strikers on GameCube. This game is an effing blast and whenever I play this game with a friend of mine, hilarity is ensured, there is always a new way to score a goal and huge laughter takes place afterwards.
The Wii version wasn't that bad, it focused on presentation, like character specific themes, fields and overall feel of the game. I definetly get a feeling of a pumped up soccer game at The Vice for example and characterse got unique attributes too. It was good, just not GCN Mario Strikers good. But a good game, nevertheless.