|“||And for being such a big help in all of this, your planet gets to go first! Prepare to bow, Popstar! Welcome your new overlord!”|
|— Magolor • Kirby's Return to Dream Land|
Another Dimension is the eighth and final level in Kirby's Return to Dream Land. It is the interdimensional space or tunnel between Halcandra and Planet Popstar opened by Magolor using the Lor Starcutter's Halcandran technology in order to start off his scheme of galactic conquest. It is the only level that cannot be accessed from the world map, and can only be accessed after defeating Landia or by going to Dangerous Dinner, entering the boss stage door, and choosing "Final Challenge" from the two options. The portals within levels with Super Abilities also lead there.
At this point, Kirby, Meta Knight, King Dedede and Waddle Dee already realized that they have been misled into fighting against Landia, who was really protecting the Master Crown from Magolor, who previously made a failed attempt to steal it. After Magolor disappears into the newly-opened dimensional rift, Landia offers its assistance and the team takes off in pursuit.
Previously, throughout Kirby's adventures on Planet Popstar and Halcandra, there are star-shaped rifts which can be revealed using Super Abilities throughout various stages which lead to dangerous places similar to Another Dimension. They have stark, dark purple environments which perpetually threaten to collapse onto itself, although the usual fauna seen on Popstar and Halcandra are sometimes present in these areas, presumably having entered through the rift before Kirby did.
All Copy Abilities (excluding Sleep) can be obtained from the enemies summoned by Magolor's third form and Magolor Soul. However, most of the enemies that yield particular abilities (such as Owgulf and Walky) are only summoned if Kirby dropped their ability to obtain a Super Ability; as such, the Copy Abilities that Kirby can obtain in Another Dimension vary depending on what ability (or abilities, if any at all) Kirby and company brought with them. In Extra Mode, Monster Flame and Flare Beam are replaced with Snow Bowl and Grand Hammer.Kirby Fighters and is the only stage to not reappear in Kirby Fighters Deluxe, instead being replaced by the Fountain of Dreams.
Another Dimension is a very basic stage, being just flat terrain, no hazards or platforms. The ground is a thin layer of amber over a dark purple. The background features a glowing red orb with a web extending from it, as well as shapes that resemble gears with varying amounts of cogs. This stage is always the last stage in single-player, in which the player fights again Shadow Kirby, who is using the same Copy Ability as the player.
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In the Heroes in Another Dimension mode, the player travels through Another Dimension, collecting hearts and going through doors that change Player 1 into a Dream Friend. Parallel versions of previous bosses, such as Kracko, Whispy Woods, and King Dedede are fought here, and The Three Mage-Sisters return as bosses once again, this time fighting as a trio instead of individually.
- Transparent images of the past levels can be seen in the background of Another Dimension. The ones found in the first segment of the level are harder to see, but the ones that appear during the Lor & Magolor battle are more visible.
- The internal file name for Another Dimension's theme in Kirby's Return to Dream Land is "st_halberd.brstm". This may indicate that instead of chasing Magolor while riding Landia, the Halberd would have been used instead.
- In Kirby: Triple Deluxe’s Kirby Fighters sub-game, Another Dimension parallels with the recurring stage in the Super Smash Bros. series, Final Destination, being a flat area and where the last battle takes place, and generally depicted as floating in space.
- Another Dimension is mentioned in Kirby: Planet Robobot. In the backstory for Susie and President Haltmann (revealed through several Boss descriptions of Meta Knightmare Returns), Susie was accidentally transported to Another Dimension after an experiment with the Mother Computer went wrong, which caused her father to believe she had perished. Susie eventually managed to find a way out of Another Dimension. It is implied that during her time there she obtained data on the Doomers, which she later input into the Holo Defense API.