UFOs are enemies that appear in Kirby's Epic Yarn and Kirby's Return to Dream Land. They are flying saucers with eyes. UFOs also have three yellow prongs on their base as well as an antenna on their heads. In Kirby's Epic Yarn, UFOs appear mostly in Space Land. Here, they attack Kirby by flying around the area and stopping every few seconds to fire a laser at him. Like with almost any other enemy in the game, UFOs can be defeated by using the yarn whip and throwing them into a wall, into another enemy etc. In Kirby's Return to Dream Land, UFOs are no longer enemies and therefore make a cameo appearance. In the Goal game at the end of every stage in a level, Kirby must use a trampoline and bounce as high as he can over some platforms. After Kirby lands on one of the 7 platforms, a UFO appears and rewards Kirby with a number of stars depending on the numbered platform Kirby is on. Since UFOs only appear in the Goal game in Kirby's Return to Dream Land, they cannot be defeated or interacted with.
- In Kirby's Epic Yarn, if Kirby stands still while viewing the picture of a UFO in Patch Plaza of Quilty Square long enough, a green variant of a UFO appears. The green variant of UFOs have three green prongs (instead of the normal yellow ones) and only appear in levels where the Rocket Metamortex if found and used in. These green UFOs will attack Kirby by firing three lasers at him instead of one like their cousins do.