That's certainly not true. Meta isn't unbeatable, GC. He just can be difficult to take on. If Meta was unbeatable, I would be the best on Wiichat (no, I am not, I've got a long ways to go). If Meta was unbeatable, he would win EVERY tourny in existence, which certainly isn't the case.
That, and I've beaten Meta's with my Falconator. That proves it alone. :P