I am getting a bit tired of seeing May win with pre-ubers. I think she should battle with pretty yet strong pokemon. Milotic is a perfect example. Gardevoir would be another good example.
Weird topic, but if she evolved the Feebas into a Milotic it would be great for contests, but Squirtle has proven itself more worthy than Munchlax so I dunno......
No, all evolutions follow the game rules in the anime as far as we know. Except Poliwhirl when it used Kings Rock and didn't need to be traded. Besides Feebas *COULD* evolve if someone with experience like Brock helps May make the pokeblock.
I thought Clampearl Did follow the rules with Deep Sea Tooth and Deep Sea Scale in the anime. Unless I'm wrong that episode was uninteresting so I didn't pay close attention.