Trick Room reverses the move order within each priority bracket so that Pokémon with a lower Speed stat attack first, while those with a higher Speed stat will attack last. Individual brackets are still maintained; moves in higher priority brackets still work before moves in lower ones regardless of Trick Room. This effect lasts for five turns, and using Trick Room counts as the first turn. Similar to Magic Room and Wonder Room, using Trick Room while it is already in effect will end it immediately.
Effects that alter the order of specific priority brackets override Trick Room. Therefore, Pokémon holding Full Incense or Lagging Tail and Pokémon with Stall will go last in their priority bracket regardless of their Speed stat. Pokémon activating Quick Claw will go first in their priority bracket.
Trick Room has a priority of -7, so will be used after all moves with a normal priority.
From Generation V onwards, Pokémon with 1809 or more Speed will still act before Pokémon slower than 1809, even in Trick Room.
If powered up by a Psychium Z into Z-Trick Room, the user's accuracy is raised by one stage.
Dusknoir's eye glows red and a large light blue rectangle with light blue transparent walls and ceiling appear around the battlefield. Then, the light blue glow fades, and the walls and ceiling becomes invisible. During battle, while the move is in effect, the slower Pokémon on the field moves extremely fast. Every time the opponent sends out a new Pokémon, the light blue transparent walls and ceiling appear again to show that it is still in effect.
Spritzee's body glows light blue and a large light blue rectangle with light blue and white transparent walls and ceiling appear around the battlefield. During battle, while the move is in effect, the faster Pokémon on the field moves slower than usual. If the wall takes enough damage, it will shatter. The move will wear off on its own in a certain period of time.
Mismagius chants a spell and can cause the opponent to see whatever illusions it wants. If the opponent doesn't like the illusion, then it will develop a headache. If the opponent accepts the illusion, they can get past it easily. Also, during battle, the slowest Pokémon on the field attacks first. Mismagius can also use the attack while inside its Poké Ball.