No more Kanto please.
BTW I do find it hilarious that Ash's Pokemon, if you count evolution lines, makes up almost half of the Kanto Top 30 poll (Charizard, Gengar, Bulbasaur, Pikachu, Dragonite, Lapras, Snorlax, Squirtle, Blastoise, Muk, Charmander, Raichu, Dragonair, Venusaur).
I do think because of this its hard for me to pick out something from Hoenn. I mean the only one on that Top 30 poll Ash has owned is the Treeko line.
Look at the others (counting entire evolution lines for reference)
Johto: Cyndaquil line, Totodile, Feraligatr, Chikorita, Heracross
Sinnoh: Lucario, Garchomp, Infernape, Torterra, Turtwig, Gliscor,
Staraptor,
Unova: Snivy, Serperior, Oshawott, Krookodile
Kalos: Greninja, Froakie, Goomy, Goodra, Noivern, Talonflame, Hawlucha
Alola: Rowlet, Decidueye, Litten, Incineroar, Lycanroc, in the Galar poll but part of the Alola Team: Meltan, Melmetal
Left off Galar since its still a work in progress, but yeah its hard for me to get a good feeling for a potential Hoenn capture when he never got any 'popular' Hoenn Pokemon aside from the grass starter. Flygon was the best bet and well that's not happening now.