>>33129732Kanto: Charizard, Kingler, Snorlax, Bulbasaur, Muk. Lots of evolved Pokemon, fairly well rounded. Poison redundancy with Bulbasaur and Muk, but still, pretty damn good.
Johto: Noctowl, Quilava, Bayleef, Heracross, Donphan. At those percentages, I'd probably swap Bayleef for Totodile. Of note, Cyndaquil and Phanpy didn't evolve during the Johto arc, and I kind of don't know how to count them.
Hoenn: Corphish, Swellow, Glalie, Sceptile, Torkoal. Middling to low, with a notable Rock weakness. Torkoal brings down the average pretty significantly, and Corphish just can’t carry the team. Hoenn saw the least amount of new captures, though, so there aren’t that many options.
Sinnoh: Infernape, Gible, Gliscor, Staraptor, Buizel. It might be worthwhile to swap Torterra in for either Gible or Gliscor. Depends if you put more stock into win percentage or BST. Either way, two Pokemon with x4 Ice weaknesses. Still, some pretty strong contenders here. A lot of final evolutions.
Unova: Krookodile, Scraggy, Pignite, Leavanny, 33%er. Tranquil makes the most sense, probably, to cover the Fighting weakness. Not a terribly well-rounded team, though. Notable Fighting and Flying weakness, with two Dark types and two Fighting+Leavanny. While there’s a deep Unova pool to pull from with nine catches, Ash’s rotating means not all of his best picks got the training and attention they needed.
Kalos: Goodra, Greninja, Talonflame, Hawlucha, Goodra, Noivern. A lot of final evolutions, but there are three Flying types and two Dragons here. It’s complete Ice Beam and Stealth Rocks bait. Ash-Greninja is super strong, though, but I'm not sure how well he can carry.