I'd have to say no. It'd be waaay too messy and complicated, and there'd be too much to keep track of it. Even if it was in a typical RPG style format like in other games, it just wouldn't feel like actual Pokemon battles. I prefer single battles over pretty much everything, I can live with double battles since they're similar, and triple battles are just barely there, but if 6v6 battles were implemented, I'd really hate it. There's a chance that like the majority of your team could be wipe out with a single attack, and it'd just be too tedious imo. I don't think we should venture anywhere above 3v3, otherwise I will cry :(