Double Abilities allow the user to play two Abilities at once.
In the second epsiode of Season 1, Shuji uses two abilities at Falconeer, Jump Over and Ventus and Pyrus Co-Side Relation abilities, the first time a character activates a "double ability", even the term wasn't introdued at the time of its airing. In the first episode of Bakugan: New Vestroia, Mira Clay and Dan Kuso used them, where the term is finally introduced and formally used. Dan is also the only brawler known to be able to activate triple abilities on his first try. Double Abilities can also be used to activate abilities of more than one part of the combined form of more Bakugan at once (Meta Altair, Meta Helios, Maxus Helios, Maxus Dragonoid, Maxus Helios MK2, Maxus Cross Dragonoid). In Bakugan: Gundalian Invaders, Brawlers use Double Abilities, but it was only called a "Double Ability" in Revelation. In most other episodes, they're called "Consecutive Abilities." In Bakugan: Mechtanium Surge, they are also called Consecutive Abilities.