I really hope Magma and Aqua expand their rosters in this game. Even without a dex expansion, there's plenty of Pokemon for them to use that they don't need to be restricted to just Zubat line, Poochyena line, and Numel/Carvanha line. There's plenty of Water types for Aqua, and Magma can just use a combination of Fire, Rock, and Ground types to flesh out their rosters. I'm thinking they could use the following:
Magma: Vulpix line, Slugma line, Sandshrew line, Rhyhorn line, Torkoal, Baltoy line, Geodude line
Aqua: Gyarados, Staryu line, Horsea line, Wailmer line, Corphish line, Psyduck line, Tentacool line
The admins especially could use unique teams now that they have actual personalities. Would be underwhelming if the storyline built those battles up only for them to continue spamming Zubat, Poochyena and Numel/Carvanha. I'm thinking the following for admins:
Courtney: Golbat, Sandslash, Ninetales
Tabitha: Mightyena, Magcargo, Rhydon
Matt: Mightyena, Tentacruel, Gyarados
Shelley: Golbat, Golduck, Starmie