DQ: 1 week
3 on 3 Triple battle
Lo and behold, the mega fortress of Dr. Eggman (AKA, Dr. Robotnik) is the stage here! Inside the macabre amusement park, you'll find several large walkways with boiling lava being right underneath you! Due to the intense heat, Fire attacks get powered up, and Water attacks get powered down. Of course, falling into magma deals Fire damage, so pushing your opponents into the pits of lava may be a tactic...
Any additional rules can be asked for...