Remember when I did that little thing where I "explained" why Mew and Mewtwo were named like they were? Well I also have some (terrible) head-canon about Wailmer and Wailord's names. Here you go:

After the terrible bookshelf incident of Kanto, the Pokemon scientists decided that not all Pokemon had to be named after their cry (although most people still used that method). So on this day, two scientists--I shall call them A and B-- were in the oceans bordering Hoenn, looking for new Pokemon. A's job was to fish, catch Pokemon, and evolve them (if they can evolve), and B's job was to think of names for the Pokemon and it's evolution(s) (if it can evolve). Suddenly A's rod pulled. He had a Pokemon! A reeled in the Pokemon as fast as he could. The Pokemon that surfaced was... a strange fish with no tail, and fins too small to carry it anywhere. On its face was a smile that was almost as derpy as a Slurpuff, although nobody had discovered Slurpuff yet. The Pokemon bounced around.

"...Mer." sighed A.

B wrote down something in his notepad. "Since you wailed 'mer' upon meeting this Pokemon, we shall call it the Wailmer." He also wrote down the "Wailmer"'s level, as this would be important for evolving it.

A spent the next few days training this Pokemon. Whenever it appeared to level up, B would write down what level it was, so they knew what level it would evolve at. Finally, after it had levelled all the way to 40, "Wailmer" was enveloped in a white light. It was evolving at last! A and B relaxed, watching the "Wailmer" revert to and from its new form, and listened to the "Dun, dun, Dun, dun, Dun, dun, Dun, DUN, Dun, dun, Dun, dun, Dun, dun, Dun, DUN, (etc)" evolution music. (There will be a YouTube video featuring this music to the side > > >)

And when the light faded, in "Wailmer"'s place there was a large, blue and tan blimp-like fish that was over six times its original size.

"SWEET LORD!" A shouted, astounded at "Wailmer"'s new height.

B wrote down some notes. "Since you wailed 'SWEET LORD' upon meeting this Pokemon, we shall call it the Wailsweetlord!"

"Nobody will like that name!" A protested.

B sighed, "You're right. How about we call it the Wailord?"

"Perfect."

And since you can't have a Pokemon-naming story without bookshelf abuse

Roseh knocked over their bookshelves.

"WHYYYYYYYYYY?" wailed A and B.

"Because I CAN!"

And Roseh left the story.