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Anime and Manga
- This is one of the Jewel Pod's (from the Jewelpet franchise) many functions.
- The Lyrical Nanoha franchise has Casual Inter-Dimensional Travel, with various Magitek starships allowing those who can't perform sufficient magic to go travel to different dimensions. Supplementary material set after Magical Girl Lyrical Nanoha A's Portable : The Gears of Destiny also had the Eltria group discovering a piece of Lost Technology that allowed them to move people from one Alternate Multiverse to another, a function they learned after some irresponsible handling of the newly discovered artifact caused it to pull in The Movie continuity version of Nanoha and Fate.
- Mahou Sensei Negima!'s Chao Lingshen eventually will has developed one of these, allowing characters to hop from one time-travel-created timeline to the next.
- Phantasy Star Online 2 has the titular Phantasy Star Online 2, which serves as a link between Earth and the dimension that the video game that the anime is based off of takes place in. It's also a Stealth Prequel.
- In Yugioh Arc V having as a main plot an interdimensional war has several of them are around, from the duel disks of the Fusion and Xyz dimensions inhabitants, and after Reiji got ahold of Yuto's duel disk he was able to implement the same feature on the Lancers (Standard) disks using cards to set up coordinates also during the first season it was already known that Yuzu's bracelet note could warp people away, but during the Battle Royale it warped her and Yugo to the Synchro Dimension and in the same vein the Yugo's Clear Wing Synchro Dragon has been doing that to him for a while now, its implied that the four Dimensional Dragons have the same power as well, because they are drawn to each other.
- This is Uchiha Obito's main Mangekyo Sharingan ability. He can use his eye to travel to an alternate 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 Intangible Man. He instinctually teleports the portion of his body that intersects with an attack into an alternate dimension. He can even reach other dimensions, but it costs a ridiculous amout of stamina and chakra to do that.
- SD Gundam Force has the Zakurello Gate, which is primarily used by the Dark Axis to invade Neotopia's dimension. The SDG spends most of the series trying to build their own device, but ultimately just use the Zakurello Gate after the main invasion.
- RASL: Dr. Robert Joseph Johnson jumps between parallel worlds using an immersion suit, a device that looks like 4 airplane turbines strapped to his shoulders and legs with an African mask covering his face.
- Atari Force: The ship Scanner One is equipped with a Multiverse warp drive that allows its passengers to travel through both normal space and multiple alternate dimensions.
- Judge Dredd: The Dark Judges possess orbs that allow travel between dimensions, which they stole from a group of aliens who made the mistake of visiting their world. Justice Department later reverse engineers the technology to create their own dimensional teleporters.
- The One has a quantum tunneling device which allows the interdimensional police to track criminals and, obviously, allows them to travel to different universes.
- Crossworlds has a staff which can get the main characters from the odd world from which the staff comes and back to what appears to be our Earth.
- Parallels has an entire derelict building that shunts people about randomly throught the Multiverse. Best guess so far is that it was built by some sort of awesomely advanced version of humanity that's either forgotten about it or doesn't much care about the havoc it's wreaking across hundreds of alternate Earths.
- In the movie Cool World, the Spike of Power created by Dr. Vincent Whiskers. It can breach the boundary between the real world and the cartoon Cool World. It is, however, a potential Artifact of Doom in that it can actually tear down the walls between worlds completely, leading to the Roger Rabbit Effect on a massive scale — and not in a fun way.
- In the 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 Robert A. Heinlein's The Number of the Beast, Professor Jacob Burroughs creates a device that allows travel between dimensions. It's installed in a vehicle and allows the protagonists to go on a series of adventures.
- The Dark Tower series has doors that allow the characters to travel between different timelines and alternate universes, including one in which they meet the author, Stephen King.
- The Chronicles of Narnia: Several times:
- The Lion, the Witch, and the Wardrobe: has a wardrobe that allows travel between Earth and Narnia — sometimes.
- Susan's horn has the power to summon help to the user, which includes help that just happens to be in another dimension, as shown in Prince Caspian.
- The Magician's Nephew has the green and yellow rings, which allow one to enter the Wood between the Worlds and leave there for any number of worlds. The rings are mentioned again in The Last Battle.
- The Transition Of Titus Crow has a clock that allows Titus Crow to travel to different dimensions.
- His Dark Materials has items that allow for interdimensional travel.
- Myth Adventures has the D-Hopper which is used throughout the series to get to different universes.
- The Incomplete Enchanter by L. Sprague de Camp and Fletcher Pratt introduced the Syllogismobile which attuned the practitioners' minds to a selected alternate universe strongly enough to shift them into it.
- In Parallax Hominids by Robert J. Sawyer, decoherence created by a quantum computer sends the neanderthal Ponter to a universe very similar to our own.
- In Philip JosÚ Farmer's World of Tiers novels, people can travel between the artificial universes of the setting by using gates. Gates can be activated by various means, including tokens and playing music on a special horn.
- The Wheel of Time has Portal Stones which, among other things, will let people travel between parallel realities.
- The Long Earth by Terry Pratchett and Stephen Baxter. Interdimensional travel is performed by the use of a Stepper, the designs for which appeared online one day. Its components are common enough to be bought from the local shops. And include a potato. Except it turns out the Stepper device is more to do with providing a kind of mental focus - the protagonist learns he can Step without a device. Also unique is the fact that, unlike most other examples where parallel universes may diverge in recent history but are still recognisably similar to our own Earth, the parallel universes of the Long Earth are wildernesses devoid of human life. Only our own Earth evolved humans.
- The titular carnelian cube in The Carnelian Cube sends one into a parallel world based on their desires at the time one sleeps with it beneath their pillow. In order to leave to another world one must find its counterpart in that particular world.
- In Down the Bright Way by Robert Reed, Pre Cursors 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, or mourning the dead worlds. The Bright's travel mechanisms are powered by 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 Faster-Than-Light Travel.
Live Action TV
- There are several "techniques" of universe-crossing in Fringe: Walter's portal, which causes both universes to begin collapsing; William Bell's technique by which he pulled Olivia into the AU (usually only works on hybrid Super Soldiers who are designed to survive the crossing; it worked on Olivia because of her Cortexiphan-enhanced physiology); and the natural way, which is achieved by groups of Cortexiphan Kids being guided by Walter (and of the three, is clearly the least dangerous, to dimensions and dimension-crossers, but not without its kinks). Besides crossing, Peter is able to use the device created to only work with his genetics to bridge the to universes creating an Inn Between the Worlds. This unlike the other devices such as Walter's portal device has no know negative side effects. Another less used method is the harmonic rods which create an equilateral triangle enveloping the subject on both sides, and have the rods vibrate at the same frequency, and two objects of approximately equal mass will exchange places in space-time. There are many ways to mess this up though, such as only placing the rods in one universe.
- Stargate SG-1:
- There's the "quantum mirror", which makes a few appearances in early episodes before being destroyed offscreen, on O'Neill's orders. In one episode, Daniel accidentally uses it to travel to another universe; in a later episode, alternate-universe versions of Carter and Kowalski come back through it, looking for refuge from the Go'a'uld invasion fleet that just arrived on Earth in their universe.
- A later episode has a strange phenomenon that causes hundreds of SG-1 teams from alternate realities to start popping up in the "main" SGC. It turns out that the phenomenon was caused by the first alternate SG-1 team to arrive, who wanted to steal the "main" reality's ZPM.
- Stargate Atlantis:
- An alternate McKay builds an "alternate reality drive" which has this function. The only problem is, it doesn't have an off switch or any way to control which reality it jumps into. This leads to one universe's worth of main characters being stranded in the wrong reality and another universe's worth dying of starvation before they can figure it out, before the actual main characters bootstrap on their research and discover a way to make it backtrack through the realities it came from (so they can at least get home, if not actually exploit the drive).
- Another episode has McKay try to use a device to generate unlimited energy by getting it from an alternate reality. Unfortunately, this ends up nearly destroying an inhabited universe, so the alternate McKay uses the "bridge" to cross over into the "main" reality. At the end of the episode, they send him back.
- There's the "Timer", several of which were actually used by the main characters (the original, the one from Egyptian World, and Colonel Rickman's Timer). The Timer's job was to open wormholes between universes, and also to malfunction or get stolen, providing half the series' plots.
- The Kromaggs have a more advanced version, which they use to conquer human worlds. In their first episode, they use a device taken by one of the Sliders to track them down on another world. However, it turns out that they didn't invent sliding technology. It was given to them by Quinn's double (the one from the pilot) to escape from their Earth, where they were fighting with humans. Later on, they try to use human brains to build instantaneous portals that work on a different principle than sliding tech in order to bypass the Slidecage.
- Doctor Who:
- In "Inferno", the TARDIS console transports the Doctor to a parallel universe where Britain is governed by Fascists.
- In "Rise of the Cybermen", the entire TARDIS travels to another parallel universe (usually referred to as "Pete's World") where Britain is a republic and zeppelins are in common use. In "Army of Ghosts" the inhabitants of Pete's World develop transporter medallions that can travel between the dimensions; later, they create a "dimension cannon" for the same purpose.
- In the same episode, the Dalek-built Void Ship (that created the tear between realities) was designed to traverse the void, or the extradimensional space bewteen universes. When it was in void transit mode, it was visible, but otherwise didn't exist (scans reported it as having no mass or dimension), and was described as creepy to look at. When the void transit functionality was switched off (just prior to the Daleks emerging), it "became" a normal vehicle with normal mass/etc.
- The Time Lords did this on a reagular basis before they died out.
- In The Monkees 1997 ABC special, Hey, Hey, It's the Monkees, we learn that Mike had turned the Monkeemobile into a dimension machine (AND lowrider, of all things). It's even capable of transporting them back to The '60s.
- In Star Trek, transporters under the right circumstances can be used to travel between dimensions. One way is to add a device to the transporter that reconfigures it for this use.
- Buffy the Vampire Slayer and Angel had at least one of these, Angel used it to travel to Jasmine's old home. And another was used to travel to Skip's holding dimension where Billy was being kept. The 'verse's portal books probably count as well.
- Jefferson's hat in Once Upon a Time can be used to travel between the different worlds.
- The Cyber Museum from MythQuest lets Alex and Cleo select a historical artifact and enter a myth associated with the culture it came from.
- Red Dwarf has had several methods for dimension travel:
- "Parallel Universe" had the Holly Hop Drive bring them there after a calculation error.
- "Backwards" had a time hole bring them to a universe where time runs backwards.
- "Dimension Jump" introduced Ace Rimmer and his ship that could travel through dimensions.
- "Only The Good..." had a prisim laser that lead to a mirror universe.
- "Back To Earth" had a dimension cutter that employed the use of the ink from a dimension traveling monster that lead to Real World Episode.
- The sequel series to Spellbinder has the Trans-Dimensional Bamboo Boat, made from some kind of woody material. It looks like a boat, and travels across dimensions.
- Dungeons & Dragons has had a number of such devices, like the Amulet of the Planes and the Cubic Gate.
- There's way more, from portals disguised as mirrors and ordinary doors that only activate when a certain combination of objects (a "portal key") are presented to them, to various high - level spells that can take you to such places as the Astral Plane, the Plane of Elemental Fire, or planes that house the afterlife.
- Module Q1 Queen of the Demonweb Pits. A temple in a Drow city has a mural of a starry sky. If the PCs pass through an image of Lolth and touch it, they will be transferred to the level of the Abyss where Lolth's Demonweb exists. Once there they can find doorways to alternate Prime Material Planes as well as the Abyssal level where Lolth's spider ship awaits them.
- Module X2 Castle Amber. The Gate of the Silver Keys takes the PCs from Glantri in the Known World to the dimension where the country of Averoigne exists.
- Paranoia had the Transdimensional Collapsatron, which allowed travel between dimensions in several adventures.
- One of the campaign settings for GURPS has the PCs as interdimensional travelers, using a variety of devices ranging from handhelds to gates to vehicles.
- Champions adventure The Great Supervillain Contest. The Crimson Claw's base had the power of interdimensional teleportation. It was originally a dimensional exploration ship: when it entered his home dimension, the Claw drained the Life Force of the crew and stole it.
- One plot hook in Rocket Age involves a man going missing from his private room, with the only object of interest being a large wardrobe. His name? C. S. Lewis!
- In Dragon Ball Multiverse, 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. 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.
- Featured in MS Paint Adventures:
- In Problem Sleuth, there two ways to travel between the real world and the world of imagination: Either climbing through a window, or entering a fort and imagining really hard (booze helps with the latter).
- Homestuck features fenestrated walls. Normally they're used to observe faraway places, but smashing through the wall allows one to travel to the location. Andrew Hussie breaks through one of these walls to get from his house in Real Life to Doc Scratch's house in the trolls' universe. Later, Jade and John use another of these walls to escape a universe that's being written out of existence.
- In Bob and George, they send the Author back through one.
- In Sluggy Freelance Riff invented the Dimensional Flux Agitator (DFA), originally to blast Bun--bun into a random alternate universe. He and Torg ended up standing on the wrong side and sent themselves instead. He later built a remote allowing people to come back. In theory.
- A one-shot character in Three Panel Soul tore his way into a parallel reality that was... a bit more parallel than most.
- In El Goonish Shive, Nioi possesses one of these which also seems to function as a Crystal Ball.
- In The KA Mics there are the Semi-Mystical Otherworldly Gates
- 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 "Kawaii" dimension, there's a Happy Bunny Forest zone, which is an entire universe filled with Exactly What It Says on the Tin. 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 Chrono Cross, Serge uses Kid's astral amulet to travel between his world and the other world which was created 10 years ago due to a universal split where Serge is alive in one universe and dead in the other. See Schr÷dinger's Cat
- In Crash Twinsanity, the psychetron created by Dr. Neocortex can travel between Crash's world and the 10th dimension and most of the game is based around gathering the power crystals needed to power the device so Crash Bandicoot can get to the 10th dimension to save his world.
- The "ancient ruins" that are the goal of 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.
- While not a device, there are two main methods shown in The Longest Journey and Dreamfall that allow travel between the various worlds. Shifters are people who physically travel via portal they themselves open. Normally they can only travel between Stark (the world of technology) and Arcadia (the world of magic). April actually had to fly into space in Stark in order to get to the Guardian's Realm via a wormhole of some sort. The sequel also introduces Dreamers, people who fall asleep in one world and project a physical double into another one. The reason both types of people are able to cross between worlds is because all these worlds used to be one until they were split up by powerful wizards and scientists with the help from some space dragons in order to keep the world from the being destroyed.
- The Yamato Perpetual Reactor in Shin Megami Tensei IV. With just the correct push, it can also serve as a handy multiverse-crushing black hole-creating machine.
- In Ratchet & Clank. The Dimensionator. Created by the Lombaxes to end the Great War against the Cragmites, they allow it's user to open portals to any dimension merely by telling the device what to find.
- In Phantasy Star Online 2, Phantasy Star Online 2 serves as this, linking the dimension that hosts Oracle and ARKS to that of Earth.
- Family Guy, Stewie invents a remote control that can travel to many universes, including one where Meg is hot, but still ugly compared to everyone else.
- Futurama: Professor Hubert Farnsworth accidentally creates a box that contains another universe where the outcome of every coinflip is reversed. The other universe's Farnsworth created a box containing the main universe. The two Farnsworths wind up creating a ton of more such boxes during the episode.
- On Teenage Mutant Ninja Turtles, 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 Turtles Forever; the teenage mutant ninja turtles use a dimensional portal stick to go to the 1987 universe.
- In Phineas and Ferb The Movie: Across the 2nd Dimension the Other Dimension-inator is used by Heinz Doofenshmirtz to go to the second dimension, as the title suggests.
- W.I.T.C.H. has several magical items that allow travel through dimensions, with the Seal of Phobos (and later the Heart of Candracer after it absorbs the seal) being the first example shown and the Mage's ring and the Tonga Tooth necklace in the second season. Elyon, the Heart of Meridian, can open Folds with her power and jokingly laments that she doesn't get any new jewelry like the others.
- Rick Sanchez of Rick and Morty has a handheld portal gun that shoots out a portal to a dimension of his choosing.
- Star vs. the Forces of Evil has dimensional scissors which cut open portals to other universes. They seem to be very common in most dimensions.