Actually thinking about Pokémon/WoW Battle Pets what they could do is something with that Final Fantasy Flare.

You create a Party of 4 Minions, each Minion would have X amount of Movesets (be it Attack, Support, Defensive, Healer roles) like in classic Final Fantasy games and you have them fight another players Party or an NPC's party (or Boss Fights in the style of classic Final Fantasy games)