Quoted By:
Mega Counterparts to all Gigantamax - who would match whom?
Some of mine:
M-Venusaur - G-Venusaur
M-Charizard X - G-Duraludon
M-Charizard Y - G-Charizard
M-Blastoise - G-Blastoise
M-Pidgeot - G-Corviknight
M-Beedrill - G-Butterfree
M-Mawile - G-Eevee (lowest BST+would hate to cuddle/would love to Cuddle)
M-Sableye - G-Meowth (lowest BST + Diamond/Money)
M-Alakazam - G-Machamp (Gen 1 trade evos)
M-Gengar - G-Gengar
M-Garderovoir - G-Hatterene
M-Gallade - G-Grimmsnarl
Hoeen Starters - Galar Starters
M-Rayquaza - E-Eternatus
For G-Urhsfifu Forms I can either see M-Mewtwo X&Y or Mega Lati@s duo
M-Steelix - G-Sandaconda
M-Lucario - G-Toxtricity
M-Aerodactyl - G-Lapras
Eternal Floette - G-Pikachu? (only second stage for each)