FusionDex

Each of the swords in Doubsect's wooden back can pull itself out to attack autonomously. Only one of them will do this at a time; if both are removed, Doubsect's body will slump to the ground.

Doubsect remains rather inert for most of its life, unless a threat is posed to it. Once it senses danger, the swords within its mushroom spring to life, flying out of the fungus and defending Doubsect with numerous quick slashes.

Doubsect are known to infest the roots of large trees en masse and drain nutrients. The complex attack patterns of its two swords are unstoppable, even for an opponent greatly accomplished at swordplay.