8/10. I like whales and marinelife so yeah. I never used it because there are so many good choices for water Pokemon in Hoenn Milotic, Ludicolo, Sharpedo, Swampert, Kyogre that I just never get around to using everyone, but what's not to like? There are a lot of very amusing facts about Wailord, that its able to mate with Skitty despite their enormous size difference and that it can't be sky-dropped because its too heavy. Also it can gltch your game if Wailmer evolves into Wailord while you are surfing on it.
Respect the thing though, he's called lord for a reason. Its bulky as heck and Wallace's Waillord was able to survive a thunderbolt from my modest Raichu and nearly take me out with Waterspout, my mouse hung on by a thread.
Speaking of Raichu... Alolan Raichu anyone?