Realm Exclusive Effect

People who live in a world much like ours where they are just average with nothing supernatural or extraordinary. While in another world, they have superpowers while in that realm, and when coming back to their world; their powers are usually inaccessible. The setting usually has two worlds that people can go from one to another.

Comic Books

 * The manfra, Dreamland, have people known as Traveler who gains access to the titular setting by facing their phobia and gaining a power related to it.
 * Amethyst, Princess of Gemworld in the original series featured Amy Winston, a normal teenage girl who travels to the magic-ruled Gemworld and transforms into Princess Amethyst. While on Earth, she's a normal girl without any powers, on Gemworld, she possesses the magical powers of the House of Amethyst.

Video Games

 * Tokyo Xanadu has the Eclipse, which is an overlap of reality with the Spirit World where certain people can use armaments called Soul Devices that can be used against creatures called Greed.
 * Subverted in Persona 4 and 5 where the characters can summon their Personas while in the TV World and Metaverse, respectively. The characters within the setting believe that they can only summon them in the alternate dimensions. They can still summon them but they would need to under heavy duress or the use of an evoker.

Web Comics

 * In the Layers webtoon, certain teenagers can teleport to another world called Layer and have the powers such telekinesis. Once someone becomes an adult, they lose the ability called Transfer that allows transportation to it.
 * Jin-Kyung from Her Summon webtoon is summoned by a Summoner from another would and gains magical powers. He uses a mundane item he has when teleported as a conduit for spells while the item gets used up as a battery would become dead and an insecticide gets emptied. When he is teleported back, he loses magic even when he tries a spell with an item that hasn't been used

Western Animation

 * Midnight Patrol: Adventures in the Dream Zone has the group and children and their dog are normal until they each have special powers while in the Dream Zone
 * Twelve Forever has the 3 protagonists who can teleport themselves to Endless Island where each has a unique power. Twelve get superhuman strength, Esther can create whips of light and transport made out the same material, and Todd is a shapeshifter.