Well, Sparky does have to work on his form a lot but he thinks his bobbing motion makes him a natural at the butterfly. If he just bobs a little more enthusiastically, he'll have it down. :D Rio De Janeiro 2016, here we come!
Olympia, hmm. I'm not sure. I don't think he can breathe air. At least, I haven't read anything about them being able to use their swimbladders as auxiliary lungs or anything like that. But see, that's an advantage. He doesn't have to come up for air when swimming a race. :D
EDIT: Pearl, Sparky will join an African team, as he is an African catfish. ;)