1. I never thought of Emboar as a wrestler. I always thought of it as a pig demon. Did some further research and people only pointed out that it looks like it is wearing a wrestling singlet. The rest of emboar's design is Chinese and based off of Sun Wukong and his companion Zhu Bajie. He has nothing to do with wrestling outside of the singlet.
2. Meganium and Delphox are metrosexual. The first weird thing I noticed about the supposed Poppilio evo is how feminine it looks and that is odd. Most starters are metrosexual or borderline masculine. You are supposed to see all the starters as male or female. Which in return makes Litten's final evo look off as well since it is so masculine.
3. Hawluchu is based on two things. A southwestern warrior called the Kachina Dancer, who are warrior bird people who come from the realm of the gods. And of course Mexican Wrestling where there is a lot of emphasis on high flying maneuvers. Hawlucha also takes inspiration from the Santo or Face type of wrestler. Where a fighter emphasizes his technique and physical conditioning, that way they can put on a show and make the audience cheer for them.
4. If Litten's final evo is real, then it is obviously based on the Japanese Wrestler/Anime series Tiger Mask. Tiger Mask also inspired several other anime and game characters with the most popular one being King from Tekken. However Litten may not be based on Tiger Mask himself, but his rival, Black Tiger. While Tiger Mask is a Face/Santo wrestler, Black Tiger was a Heel/Rudo wrestler. This type of wrestler emphasizes brute strength and raw power over technique or wowing the crowd. Heel/Rudo wrestlers are also willing to fight dirty to secure their victory. Which makes the Fire/Dark typing make sense. Though I have no clue where you guys get the fire/dark theory from outside of this.
Edit: The Pokemon also seems to have inspiration from American Professional Wrestling rather than Hawlucha's Mexican Style of Wrestling. The only other Pokemon that takes inspiration from American Pro Wrestling is Machamp, whom is also based on Body Builders and the Asura.
5. Poppilio's evo takes obvious inspiration from a mermaid as well as Sirens and Muses. It may also take inspiration from the Inuit Goddess of the sea, Sedna. Who is a young girl with sea lion fingers. I don't really have much else to say about this Pokemon except that Poppilio is a semi masculine Pokemon that emphasizes physical prowess and we are told to believe that it turns into a magestic singer. Idk if I buy that.