Holo Defense API

Holo Defense API  is a boss in Kirby: Planet Robobot. It is the boss of Resolution Road.

Physical Appearance
Holo Defense API is made up of four crystals surrounded by floating tablets, which spin around it. The crystals are orange, teal, purple, and yellow.

Attacks
Holo Defense API summons four bosses as holograms from previous games.

Holo-Kracko
Holo-Kracko's attacks and appearence are similar to Kracko in Kirby: Triple Deluxe.

Holo-Sphere Doomers
Holo-Sphere Doomers look like the Sphere Doomers in Kirby's Return to Dream Land and can shoot fireballs.

Holo-Ice Dragon
Holo-Ice Dragon's attacks are similar to Ice Dragon's attacks in Kirby's Dream Land 2.

Holo-Coily Rattler
Holo-Coily Rattler is similar to his Kirby: Triple Deluxe counterpart.

Once the four bosses are defeated, the Holo Defense API attacks. After only one hit, the Holo Defense API is defeated.

Trivia

 * ​Holo Defense API is similar to Ado and Adeleine in the fact that they draw previous bosses to battle, and only take one hit to defeat when they're attacking Kirby themselves.
 * All 3 also summon the Ice Dragon as an opponent.
 * In The True Arena and Meta Knightmare Returns mode, the Holo-Sphere Doomers' look is similar to their form in Extra Mode of Kirby's Return to Dream Land.
 * Similarly, in the same modes, Holo-Kracko's look is similar to that of Kracko's Revenge in Kirby Super Star Ultra's Revenge of the King, while Holo-Coily Rattler's look is similar to its DX form in Dededetour.
 * Holo Defense API is one of the few bosses to have no eyes. The others are Pix, Reactor, Main Cannon No. 2, Galactic Nova Nucleus, Master Hand & Crazy Hand, and the Lor Starcutter.
 * It closely resembles Pix, the boss of Rock Star in Kirby 64: The Crystal Shards.
 * In addition, both Pix and Holo Defense API's crystals shatter and leave only their wire frames after being defeated.