Phobos and Deimos

Phobos and Deimos (フォボス&ダイモス) are the sixth boss from The Ninja Warriors Again.

Details
Phobos and Deimos are basically headswaps of Gigant, the game's first boss, wearing helmets with a visor. They have the same attacks as Gigant, as well as new ones such as a jumping kick, a sliding kick and a grab attack. Both of them share the same health gauge, something the player can exploit by hitting both at the same time, thus causing double the damage.

Much like the Gigant they are much larger in The Ninja Saviors: Return of the Warriors and thus immune to throws outside of some special throws from Raiden.