The Dimension Mirror is a powerful artifact which can be found in the Mirror World in Kirby & The Amazing Mirror, and also makes an appearance in Kirby: Triple Deluxe. It is sequestered in the center of the Central Circle of Rainbow Route. The mirror serves as a gateway to another realm, and is adorned with a luxurious golden frame with wing and crown insignia.
In Kirby & The Amazing Mirror, the realm of the Dimension Mirror is corrupted and turned into a dark eerie reflection by Dark Mind, whereupon it begins to make evil copies of whatever stares into it. In order to prevent interference from the heroes of Dream Land, one of these reflections - Dark Meta Knight - shatters the mirror into eight pieces and then scatters them throughout the mirror world. It is up to Kirby and his recently-created clones to obtain the shards and restore the mirror before they can face down Dark Mind and save the mirror world. A similar mirror also appears above the skies of Dream Land, which serves as the gateway to the Mirror World. It is seen only in the intro cut-scene to the game.
Kirby & The Amazing Mirror
The Mirror is the tenth and final level in Kirby & The Amazing Mirror. It is unlocked when Kirby collects all of the Mirror Shards from defeating the Bosses in each level of the game. When all the shards have been collected, the mirror-shaped portal, which was deactivated when Dark Meta Knight split the mirror into shards, will turn gold once again. At this point, the portal to Dimension Mirror has been restored, and the four Kirbys can face Dark Meta Knight and vanquish Dark Mind.
The realm inside the Dimension Mirror is split up into nine areas. At the end of each area is a mirror-shaped portal that teleports the Kirbys to the next area. The first area is where Dark Meta Knight makes his last appearance in the game. The area has a large, circular, purple cloud looming above everything which stretches across the entire length of the sky. There also seems to be what looks like the ruins of a coliseum in the background, which is similar to the intact coliseum of the Central Circle in Rainbow Route.
After defeating Dark Meta Knight, the Kirbys are sucked into an eerie portal, and Meta Knight tosses his sword in after them. In the next area, Kirby is prompted to pick up the sword, after which, Dark Mind appears for a fight. Dark Mind must be battled four times in slightly varying environments. In-between each battle is an intermediate room which contains a series of puzzles to solve and enemies and items to utilize. After the fourth defeat, Dark Mind assumes his true form for one more much longer fight. As this fight begins, Shadow Kirby appears to give Kirby back the Master sword if he lost it earlier.
Once Dark Mind is defeated in his true form, Kirby takes off after him on his Warp Star and has one last showdown against him in the game's credits. Once these end, Dark Mind is finally defeated, and the game is complete.
The following enemies appear in the intermediate chambers between each Dark Mind battle:
Notably, none of the enemies present are ones that made their debut in Kirby & The Amazing Mirror.
Kirby: Triple Deluxe
At the end of Dededetour!, King Dedede encounters the Dimension Mirror after defeating Queen Sectonia DX. Out of the mirror comes a dark reflection of himself known as Shadow Dedede which he must fight. Upon Shadow Dedede's defeat, the genuine Dedede jumps into the mirror to find the same eerie area featured in Kirby & The Amazing Mirror. Here, he must face down against Dark Meta Knight's Revenge. After defeating him, Dedede seals him into the mirror and then smashes it to pieces, completing the game.
It is revealed through pause captions that prior to the events of Kirby: Triple Deluxe, Taranza had obtained the mirror and brought it to Queen Sectonia as a gift. Both having been unaware of the mirror's dark power, the queen stared into it continuously, growing more physically and mentally warped until she became the mad tyrant seen in the game proper.
Meta Knight is banished into the mirror.