Well, it's not a league-wide thing, but we tend to get a double battle going. The rules are simple:
* Your teammate is diagonal from you.
* You set out three Prizes each.
* Once you've taken all three of your prizes, your teammate starts taking prizes for your K.O.'s
* If someone loses all their basics, they don't lose. They just, on their turn, draw a card. If it's a basic, they play it. If it's anything else, that players turn ends.
* There are three ways to win: You and your teammate take all your prizes; BOTH of your opponents have no basics in play; or BOTH of your opponents have no cards in their decks.
These are some rules we've adapted to make the games more fair:
* Pokemon attacks that say, "This attack does 10+10 damage for each Pokemon in play" (like Jumpluff HS) ONLY apply to you and the person you're attacking, not to everyone.
* Anything else that says "You and your opponent" (like Judge) apply to everybody.
* Cards like Cyrus's Initiative that refer to "Your opponents hand" ONLY apply to you and the person you choose, not to everyone.
* NO SCOOPING!!!
These games are quite fun, and, maybe for a tournament, people are assigned partners and then the winning team move on.