|This article contains information that does not coincide with the main series canon.|
|“||The energy of this world has drawn strange shadows to the Ruins...”|
|— Quest Description (Tough) • Team Kirby Clash Deluxe|
Greater Doomer is a giant indigo and purple Sphere Doomer with yellow eyes. It has 12 feathers hanging from the back of its jaw, like Grand Doomer. Unlike other Sphere Doomers, its mouth does not hold an Energy Sphere.
Greater Doomer is first fought in the Ruins after being unlocked for 16 Gem Apples. It is in the Tough boss category and must be defeated before the player can access Pyribbit in the Volcano. When Team Kirby enters its area, the boss emerges from a dimensional rift. It attacks primarily by swooping back and forth between the two edges of the screen, spitting orbs, and dropping orbs from the sky. After half its health is depleted, it gains new attacks: It spits orbs from the background, rushes into the foreground, rockets across the screen, and pursues the Kirbys while creating explosions around its body.
Greater Doomer is later fought in the Dunes. Here it is in the Tougher boss category, and must be defeated before the player can access Landia EX in the Decisive Battlefield. Its new attacks include spitting orbs that hover in the air before launching toward Team Kirby; rocketing halfway across the screen, pausing to aim again, then rocketing all the way; and generating three blobs that revolve around its body.
|“||A lost bird's wings spread across the dimensions and blend into the night sky...”|
|— Quest Description (Tougher) • Team Kirby Clash Deluxe|
- Greater Doomer's model and animations are largely reused from Grand Doomer and Sphere Doomer from Kirby's Return to Dream Land. Some attacks are reused as well.
- Greater Doomer's theme is a remix of Meta Knight's battle theme from Kirby Super Star and its remake. This reflects Sphere Doomer's battle theme in Kirby's Return to Dream Land.