|“||You cleared Story Mode! The Ability Planet and Extra Planet δ are unlocked. Head for Far-Flung Starlight Heroes!”|
|— Cleared Story Mode • Kirby Star Allies|
Extra Planet δ is the fourth and final extra stage in Far-Flung - Starlight Heroes in Kirby Star Allies. The majority of the stage involves Kirby and co. traversing through a large maze and using all of their abilities to get through the obstacles. The group will then need to use the Friend Star.
Near the end of the stage, three floating blocks, one in the shape of a Control Pad, and the other two in the shape of buttons come together with the background to form what closely resembles a Nintendo Gameboy. When Kirby enters the door, everything will change to greenish color as in Kirby's Dream Land. At the end of this part, Kirby and co. will have to press a Switch. Doing so causes the Special Golden Kirby Statue with a "We ♥ Kirby" sign to emerge from the ground. After the statue fully emerges, lots of Point Stars, food, and puzzle pieces will drop from the sky. The Final Door is located in the Kirby statue's mouth.
|Robobot Memories||Use Plasma from Plugg to power a wire to open a gate. Use Fire from Burning Leo and Staff from Jammerjab to create Sizzle Staff. Use Up Jab to light the fuse to the giant dynamite; alternatively, one could use Yo-Yo from Gim instead of Staff.|
|“||You've cleared Story Mode! The path to Extra Planet δ is now unlocked!”|
|— Unlocked Extra Planet δ • Kirby Star Allies|
- The music for this level contains "Corkboard Music 2" from Kirby Super Star Ultra, "Bring on the Super Ability! " from Kirby's Return to Dream Land, "Hypernova Inhale" from Kirby: Triple Deluxe, "Pink Ball Activate!" from Kirby: Planet Robobot and Green Greens's music from Kirby's Dream Land.
- All of the mid-bosses in the game appear in this stage.
- When the Switch at the end of the stage is pressed, the theme song for Green Greens will play in the HD Rumble of the player's Joy-Con or Pro controllers, but only if one has the Switch in TV Mode.
- In the 2.0.0 update, Marx, Gooey, Rick, Kine, Coo, King Dedede, Meta Knight, and Bandana Waddle Dee were added to the golden statue.