As much as I like ORAS, even I will admit the major problem with it is the lack of Emerald features. I know it's a remake of R/S, but HGSS gets to have Crystal elements added in. I think it should've gotten Gym Leader rematches. I mean, even LGPE gets to have them. So, I've decided to give the Hoenn Gym Leaders their own rematch teams, like with the E4. Here are the teams I have in mind for them.

Roxanne: Golem, Carbink, Bastiodon, Crustle, Probopass, Aerodactyl (Mega)

Brawly: Machamp, Hawlucha, Toxicroak, Sawk, Hariyama, Medicham (Mega)

Wattson: Electrode, Heliolisk, Rotom (Wash), Eelektross, Magnezone, Manectric (Mega)

Flannery: Magcargo, Camerupt, Infernape, Ninetales, Torkoal, Houndoom (Mega)

Norman: Exploud, Girafarig, Stoutland, Ambipom, Slaking, Lopunny (Mega)

Winona: Pelipper, Staraptor, Togekiss, Skarmory, Altaria, Pidgeot (Mega)

Tate & Liza: Reuniclus, Wobbuffet, Bronzong, Solrock, Lunatone, Alakazam (Mega)

Juan*: Walrein, Gastrodon, Crawdaunt, Swanna, Kingdra, Slowbro (Mega)

* - I include Juan because ORAS need Emerald attributes, including characters.