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A lone Dubior from Popstar in Stage 5 of Nutty Noon
Debut Game Kirby's Return to Dream Land
Latest Game Kirby: Planet Robobot
Copy Ability Spark
Similar to UFO
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Dubior is a Mid-Boss that debuted in Kirby's Return to Dream Land. It resembles a UFO-like floating robot, with yellow shining eyes. Its underside is orange, and surrounding that side are five stubs that shoot lasers. It yields the Spark ability when defeated and inhaled.

Dubior has an advantage over most other Mid-Bosses in that it can hover, and spends much of its time off the ground. It is also capable of summoning little minions (known as Dubior Jr.s) to defend itself, and delivers an arsenal of electric attacks. In the extra game, it (now called Dubior EX) summons more minions.

In Kirby's Return to Dream Land, Dubior appears in the following stages:

Dubior also appears in Kirby: Planet Robobot, serving the same function as before, though it now possesses the ability to attack from the foreground and background.


  • Dubior is one of the few Return to Dream Land Mid-Bosses which does not appear in New Challenge Stages.
  • Dubior's normal color scheme pays homage to the Robotic Operating Buddy, also known as R.O.B. (specifically the Famicom version).