I have a couple of different house rules I like to use.1) The "Set" rule.This is an easy one. If all players agree, one can simply place the Bakugan on the card they wish to put it on, rather than wasting time rolling. It also allows the use of cards other than re-roll cards.2) The "Best of 3" rule.This one is more complicated and pushes the rule of 3 to its limit.Rather than three bakugan, you have six. You also have two of each card color, like in the 6vs6 rules. However, in this game it is best two out of three rounds (win a game twice to win the match) and you cannot change the cards you pick, but you instead pick a standard set of 3 bakugan and one of each card color like the regular game out of the 6 Bakugan and 12 Cards you brought and set the rest aside for that round. You can freely swap out cards and bakugan between rounds to make a new set for the next one as long as their from your original 6/12. This allows for a more dynamic game and might be good for a tournament.