Anyone ever tried to do a water type challenge run before?
Yes, water is a great monotype because they can be good offensively and defensively, with few weaknesses and many powerful stab moves available to you, and several interesting dual type combinations to help you further with coverage.
I know i did one in Pokemon Red, and think i brought that team over to Stadium back in the day. It included Blastoise, Gyarados, Starmie and Cloyster as 4 of my mates. I chose Kabutops for my fossil. I also evolved my eevee into Vaporeon. Though i am not sure why i didn't use Tentacruel there, it's poison typing would have really been advantageous. I had fun though.
What do you do in the older games where there are a ton of water HMs? Is your water HM Pokémon your main water mon, or do you run extra?
That's a good question. I like the Surf HM for my main water pokemon, or Waterfall if it's a physical attacker, and i am excited when i obtain them, because not only can i go places now where i couldn't before, but because they are actually good attacks that can do some real damage. I would choose them over hydro pump or aqua tail since they have no accuracy issues, and you get the flinch chance with waterfall or can hit both enemies and set off abilities of your teammate in doubles using surf. So definitely yes to these two.
Whirlpool is more of a maybe. It is weak and inaccurate, but can have some use for trapping pokemon. So while i don't normally use it on my main pokemon, i have put it to use in certain situations.
The only one i would take a pass on is dive, using it only on my HM mule to get around. Dive draws the battle out longer- taking a turn of getting ready before you can attack, an opportunity for your opponent to set up, protect or still attack you with certain moves that will do extra damage underwater. No reason to use it over Waterfall, which has the same power and doesn't make you do that.
Did you pick this line as your starter in Paldea?
No, i was always unwavering in my support for Team Sprigatito. I had picked water starters for the last three generations, with Froakie, Popplio and Sobble, but the grass kitty cat line upset that trend.
How do you feel about this line?
As a pokemon to use it's good, has a mighty attack stat to be reckoned with and a cool signature move in aqua step, that fits it's theme of a carnival dancer, and movepool overall that is really enviable, roost, sword dance, aqua jet, acrobatics, close combat, u-turn, ice spinner. Design-wise, i am still on the fence though. I like the idea of all the plumage and tail feathers being like a samba headress and costeiros, but when i see the pokemon's legs i want to start laughing because it looks kinda silly too, especially the feet.
Would you have liked the final evo to have had a different secondary typing?
I think water fighting is pretty cool type. I always liked Keldeo, and i think fighting is a combo that makes since for the concept od Quaquaval since dancing is a talent that requires some athleticism.