Finneon, the Wingfish Pokémon. Because of its twin-tail fins that flutter like wings when swimming, Finneon has been called the ‘Beautifly of the Sea’.
– Ash’s Pokedex
Finneon seems like a filler Pokemon to me. There’s already a lot of fish-based Pokemon, that Finneon doesn’t seem to be anything special.
Its stats are fairly even, with Speed as the greatest stat. Though it can have the ability Swift Swim, which doubles its Speed in rain. Also, the change of Storm Drain’s mechanic in Gen V (it now grants immunity to Water type moves, and raises Sp Attack by one stage, in addition to drawing in all single-target Water moves) makes it slightly more useful.