In Brawl's Adventure Mode plot, what enemy group is led by the Ancient Minister?

In Brawl’s Adventure Mode plot, the enemy group led by the Ancient Minister is the Subspace Army.

The Subspace Army is the principal invading force in The Subspace Emissary, Brawl’s story-driven adventure. Its troops emerge from Shadow Bugs and use Subspace Bombs to pull locations into Subspace, an alternate dimension. The campaign follows the playable fighters as they gradually unite against this threat.

The Ancient Minister initially appears as the army’s cloaked commander. He oversees operations involving R.O.B. units and the detonation of Subspace Bombs, each of which requires the sacrifice of two R.O.B. units. Later, the story reveals that the Ancient Minister is actually the leading R.O.B. unit, whose loyalties change after Ganondorf attacks the Isle of the Ancients.

The group’s hierarchy creates a frequent source of confusion. The Ancient Minister commands the Subspace Army in the plot, but he is not the ultimate mastermind. Ganondorf acts under Master Hand’s orders, while Tabuu is ultimately revealed as the force controlling events and the true architect behind the invasion.