This game is really cool, but gets boring rather fast...
But then again, when I was playing this years ago (yes, it's that old), there wasn't an online feature. I only played with my friend which had me playing it longer.
We always had us + one AI playing... Sometimes two AIs. The other would power-up while the other would keep the AIs busy.
In the end we both would have enough power to blow up the entire arena with one Kamehameha/whatever beam the other characters used.
Even though repetitive, it was still fun.
Everyone should try it at least once, especially now that there's an online VS function.