''The Mastermind of Mirage Pokémon'', also known as ''The Terrifying Mirage Pokémon'' in Japan, is one of three {{Anime/Pokemon}} specials.

Dr. Yung shows Ash and his friends holographic Pokémon, also known as Mirage Pokémon. [[DoesThisRemindYouOfAnything They have no weaknesses and know moves that they normally can't learn.]] However, the Mirage Master kidnaps Dr. Yung and Professor Oak, and Ash and his friends are unable to rescue them because of an army of Mirage Pokémon.

This special is infamous for [[TheOtherDarrin the voice cast change]] well before the special aired. The Pokémon Company said that they used the special for a testing ground for the new actors. Of the results, Ash's intended replacement, [[Anime/YuGiOh Kayzie Rogers]], was replaced by newcomer Sarah Natochenny. Some liked the new voices, but most hated them. Petitions were created in order for the old voice actors from 4Kids Entertainment to return, even before the new cast's work was aired. Thankfully, most of the new actors (save for Ash and Brock's, both of whom still remain [[ReplacementScrappy Replacement Scrappys]]) [[VocalEvolution got better over time]], so the complaints lessened.
!!This movie provides examples of:
* [[spoiler: ActuallyADoombot: The Mirage Master who kidnapped Dr. Yung was actually just a hologram.]]
* AllYourPowersCombined: Mirage Mewtwo, who gains the ability to use every move.
* AnachronicOrder: At the time the movie was first broadcast in the US, Pikachu had not learned Volt Tackle in the series. At the end of the movie, however, Pikachu delivers one to Mewtwo with no problem.
* BigBad: The Mirage Master, [[spoiler: aka Dr. Yung]].
* BruceWayneHeldHostage: An interesting variation. Early in the movie, Dr. Yung is kidnapped by the Mirage Master, only for it to be revealed at the climax that [[spoiler: Dr. Yung IS the Mirage Master, and the one who supposedly kidnapped him was just a hologram]].
* CoatHatMask: The Mirage Master wears this in order to keep his identity a secret. Ultimately he ditches the mask and hat.
* CoolMask: The Mirage Master's. Its metal and has red designs on it.
* ContinuityNod: During a memory-probe of Pikachu, a screen displays Pokémon that appeared in the second through fifth movies. Ultimately, a holographic Mewtwo is created based on those memories.
** Said mirage Mewtwo is also able to use the attacks of the Legendaries in Pikachu's memory.
** The password for Oak's lab is REDGREEN, a ShoutOut to [[VideoGame/PokemonRedAndBlue the two games that started it all]].
* CurbStompBattle: Basically the entire fight is this, as Mirage Mewtwo is far too powerful for all of the gang's attacks combined to even scratch.
* DoesThisRemindYouOfAnything: Mirage Pokemon is an allegory for hacked pokemon, one that couldn't be more blatant unless [[spoiler: Dr. Yung]] put Wonder Guard onto it.
* DramaticUnmask: When the Mirage Master is revealed to be [[spoiler: Doctor Yung.]]
* [[spoiler:EvilAllAlong: Doctor Yung]]
* [[spoiler: FourEyesZeroSoul: Doctor Yung]]
* [[spoiler: GoOutWithASmile]]: [[spoiler:Mew.]]
* HeyItsThatVoice: In addition to Kayzie Rogers and Jimmy Zoppi, Ken Gates returns to his old role as the narrator.
** Dr Yung's voice would later be Harley in the main series.
* HighCollarOfDoom: The Mirage Master has one on his coat.
* HighlyVisiblePassword: So that we can see the reference.
* [[spoiler: IdentityImpersonator: The first time we see the Mirage Master, he's actually just a hologram.]]
* InstantAIJustAddWater: Mirage Mew, who was given sapience apparently by accident. Or maybe it found a way to...
** GrowBeyondTheirProgramming
* JustAMachine: [[spoiler:Doctor Yung's]] view of the Mirage pokemon. They're shown to be right about all of them but Mirage Mew.
* LabcoatOfScienceAndMedicine: Dr. Yung and Professor Oak wear them.
* [[spoiler: MadScientist:Dr. Yung]]
* NiceHat: The Mirage Master has what looks like a black and gray fedora.
* NoHoldsBarredBeatdown: Mewtwo vs Mew. [[spoiler:It doesn't end well for Mew.]]
* OffModel: Justified as [[Creator/TamaProductions the animation studio]] responsible for making the special had never done any prior Pokémon-related work.
* TheOtherDarrin: See above.
* PowersAsPrograms: Quite literally in this case, as the holographic Pokémon are capable of using any attack.
* RidiculouslyCuteCritter: The mirage Mew.
* TheSociopath: The titular villain, [[spoiler: in actuality Dr. Yung]], who places no value on life.
* StrollingThroughTheChaos: The Mirage Master at the end when they walk back into the collapsing lab. Even the main characters are briefly stunned at them.
* TakeThat: Against players who use hacking devices on their Pokémon games.
* TheyCalledMeMad: [[spoiler:Doctor Yung]] was expelled from the Pokemon Institute because their research was considered unethical.
* TurnedAgainstTheirMasters: [[spoiler:Mirage Mew]]
* UncertainDoom: In the end, we don't find what happened to the Mirage Master, though since no body was found they might have escaped and is still out there, planning...
* WhatMeasureIsANonHuman: Mirage Mew. [[spoiler: Dr. Yung merely views it as a glitch in the Mirage system, even as it was the closest to being a living Pokémon. Dr. Yung is also called out on preferring his Mirage system over utilizing real Pokémon.]]
* YouHaveOutlivedYourUsefulness: Upon creating Mirage Mewtwo, the Mirage Master orders it to attack the other Mirage Pokémon that had been helping him up to that point.