History Main / InterdimensionalTravelDevice

** Module X2 ''Castle Amber''. The Gate of the Silver Keys takes the {{PC}}s from Glantri in the Known World to the dimension where the country of Averoigne exists.

* This is one of the Jewel Pod's (from the ''Franchise/{{Jewelpet}}'' franchise) many functions.

There may be lots of FridgeLogic involved, depending on the nature of the device in question. For example, in the version shown in the image, where you open up a portal that doesn't need to be attached to the surface of a flat object, how do you ensure that the other end is always exactly at the surface of the desired planet, and perpendicular to the ground? And if you decide to go exploring universes you've never been to prior (and thus have no data on what things are in it and where), how do you avoid, say, [[FridgeHorror destroying your home planet by accidentally opening the other end in the interior of a sun?]] And even if you decide to be cautious about it, how do you gather data on said universe without [[Catch22Dilemma actually opening a portal and sending a drone or probe in first?]]

A device that allows travel between [[AnotherDimension dimensions/alternate universes/planes of existence/etc]]. This device could be anything, from a machine in science fiction to a magical item in fantasy, as long as it allows travel between these dimensions or realities. It could even be a human (or, at the very least, a sentient being), if they have the power to go to these other "places".

* The ''Literature/{{Kadingir}}'' series has the titular Kadingir technology, which opens portals to connect Earth with a parallel dimension. [[TheHeroine Ishtar]] activates one such devices by accident thinking it was a Game Boy and gets lost in planet Ki as a result.

* What's only known as the Calamity Box from ''{{WesternAnimation/Amphibia}}'' transported the protagonist to the titular universe where sapient, anthropomorphic amphibians live in a rather dangerous swamp world of monstrous predators. Season 2 has their king reveal that the device was created by his ancestors to traverse various alternate universes, and it needs to be taken to three temples they built to recharge it for another trip.

* ''Series/{{Sliders}}''

* On ''WesternAnimation/TeenageMutantNinjaTurtles'', the Turtles use the transdimensional portal, a technology that allows travel to alternate universes. It is most commonly used in the 1987 cartoon series. Another approach is used in ''WesternAnimation/TurtlesForever''; the Teenage Mutant Ninja Turtles use a dimensional portal stick to go to the 1987 universe.

* ''Manga/MahouSenseiNegima'''s [[spoiler:Chao Lingshen]] eventually [[TimeTravelTenseTrouble will has developed]] one of these, allowing characters to hop from one time-travel-created timeline to the next.

* Franchise/{{Naruto}}: This is Obito Uchiha's main Mangekyo Sharingan ability, Kamui. Both of his eyes can send something to a PocketDimension. His right eye is a defense mechanism, being used so Obito can travel to the dimension at will. He can even send parts of his body when in danger so he could dodge at the last second, giving the illusion that he is an IntangibleMan. His left eye, which was given to Kakashi Hatake, is the offensive version of the same ability. Namely, it can teleport someone or something to the pocket dimension.

* Creator/MarvelComics' features plenty of casual multiversal travel - such technology is common in a technologically advanced universes, and from there it gets spread throughout the rest. Entire series such as ''{{Comicbook/Exiles}}'' and ''Comicbook/WebWarriors'' are built on the use of this trope, as are many other storylines such as ''Comicbook/JonathanHickmansAvengers'', ''Comicbook/SpiderVerse'' and ''ComicBook/ContestOfChampions'' (2015).

* In the ''Film/{{Thor}}''/''Series/{{Being Human|UK}}'' crossover series, ''FanFic/{{Housemates}}'', Dr. Strange devises one for Coulson's and Mitchell's universe hopping in the form of a ''smart phone app''.

* On [[MagicTheGathering the plane of Kaladesh]], Rashimi develops what she thinks is a simple teleporter, but is actually a device to move between the planes. This is incredibly powerful, as while Planeswalkers can move themselves between planes no problem, there are restrictions on what they can bring with them that will arrive intact. Tezzeret gets a hold of it and eventually develops it in to the [[https://gatherer.wizards.com/pages/card/details.aspx?multiverseid=423838 Planar Bridge]], [[spoiler: which he eventually uses to help Nicol Bolas by bringing his army from Amonkhet to Ravnica.]]

* The "ancient ruins" that are the goal of ''VideoGame/{{Touhou}} 3: Phantasmagoria of Dim. Dream'' turn out to be a Hyperprobability Space Vessel used by Yumemi and Chiyuri to travel from their own world to Gensokyo in search of the secrets of magic.

* In ''WebComic/DragonBallMultiverse'', some guys called the Vargas have one; it drives the plot, as they're able to cross between universes (timelines). They come from a different universe than the one the protagonists live in, and they offer them a chance to participate in a tournament among fighters from different universes. [[spoiler:One of them is hijacked by King Vegeta and the Saiyans of Universe 10 in a coup d'état. But this part of the plot is in a galaxy far, far away... and only discussed in the novelization.]]

* In Blackbird's ''{{Aniverse}}'' setting, the hammerspace drive, which can fit in a character's pocket and allows travel into {{hammerspace}}, which connects various zones in different dimensions. For example, in the "[[{{UsefulNotes/Kawaisa}} Kawaii]]" dimension, there's a Happy Bunny Forest zone, which is an ''entire universe'' filled with ExactlyWhatItSaysOnTheTin. In the "Boring" dimension, there's Tokyo Prime, a universe where Tokyo is the center of everything, but nothing ever happens there, and so on.

* In the ''Literature/{{Paratime}}'' series by H. Beam Piper, the means of traveling through timelines is a conveyor using the Ghaldron-Hesthor field-generator. Conveyors are fixed in place, which means that as they travel through timelines, they may end up inside nuclear reactors or other hazards or be caught in warfare (a common activity on at least one timeline in nearly every trip, Paratimers note). Weakening of the transposition field is a concern of Paratimers.

* In ''Down the Bright Way'' by Creator/RobertReed, PreCursors left behind The Bright, a one-dimensional path of travel between different planes of reality. The Wanderers use it to travel to different Earths, which diverged millenia prior; exploring, teaching, stabilizing, [[AfterTheEnd or mourning the dead worlds]]. The Bright's travel mechanisms are powered by [[spoiler: a planet that has been converted into a massive fusion reactor]], and the Wanderers state that the Bright is so energy expensive to operate that comparatively, colonizing the Milky Way in any one plane would be a ''much'' easier task despite the lack of FasterThanLightTravel.

* On ''WesternAnimation/TeenageMutantNinjaTurtles'', the Turtles use the transdimensional portal, a technology that allows travel to alternate universes. It is most commonly used in the 1987 cartoon series. Another approach is used in ''WesternAnimation/TurtlesForever''; the teenage mutant ninja turtles use a dimensional portal stick to go to the 1987 universe.

** Come ''Series/PowerRangersNinjaSteel'' and the series' 25th Anniversary episode, it seems other Rangers have been developing a dimension-hopper of their own, called a Transportal Device, capable of traversing between variant timelines. Such a device, as pointed out in ''[[WebVideo/HistoryOfPowerRangers]], makes future team-ups all the more simple from a meta-perspective, since the writers won't have any reason ''not'' to have the Rangers use it.

** The Amulet of the Planes is a powerful MagicalAccessory that lets the wearer transport themself and others to any other Plane of existence. There's no limit on its use, but it requires an {{Intelligence}} test each time to target the correct destination.

* ''Series/TheManInTheHighCastle'': Throughout the series, various characters are able to visit parallel universe through some form of meditation, causing the film reels showing these worlds to spread. In season 3, the Nazis build an interdimensional travel device through technological means in an abandoned mine, the ''Nebenswelt'' project, in order to conquer other worlds.

* Some theories suggest black holes, or rather wormholes within them, could act as this whatever fell into them often sent to another Universe. These ideas, however, [[ScienceMarchesOn have been put into doubt by later ones]] that state that either said wormhole would be unstable and close inmediately, so no interdimensional travel of any kind, or that said behavior is a failure of our current theories.

* ''WesternAnimation/StarVsTheForcesOfEvil'' has dimensional scissors which cut open portals to other universes. They seem to be very common in most dimensions.