Dude, Wakkas ultimate weapon is awesome! It's a blitzball yeah, but it's a blitzball with like Chainsaw blades coming out of it.

There are alot of questions about his fighting though, How can he throw so far if his pass stat sucks so much? How does it not hurt when he catches and cradles a spiked ball against himself? How does it always come back to him? Why are people ever making blitzballs covered in spikes?!

There are too many questions to bother figuring out all the answeres. Wakka is just cool enough to do all that. (Apparently he is trying to emmulate Lord Oholand, who apparently also fought with a blitzball, hence wakkas ultimate weapon)