Mega Evolve Pokémon has yet to Anime Debut

[Tom1291]

So far Pokémon can Mega Evolve debute in anime series such as...
XY Series

• Mega Blaziken (XY001: Kalos, Where Dreams and Adventures Begin!)
• Mega Gardevoir (XY028: The Bonds of Evolution!)
• Mega Lucario (XY032: The Aura Storm!)
• Mega Mawile (XY034: The Bonds of Mega Evolution!)
• Mega Garchomp (XY068: Garchomp's Mega Bond!)
• Mega Charizard X (XY106: A Meeting of Two Journeys!)
• Mega Audino (XY096: A Giga Battle with Mega Results!)
• Mega Abomasnow (XY122: A Real Icebreaker!)
• Mega Charizard Y (XY125: A League of His Own!)
• Mega Absol (XY126: Valuable Experience for All!)
• Mega Sceptile (XY126: Valuable Experience for All!)
• Mega Gyarados (XY133: Coming Apart at the Dreams!)
• Mega Metagross (XY134: The Right Hero for the Right Job!)
• Mega Houndoom (XY134: The Right Hero for the Right Job!)

Sun & Moon Series

• Mega Steelix (SM043: When Regions Collide!)
• Mega Aggron (SM089: The Prism Between Light and Darkness!)
• Mega Kangaskhan (SM130: Battling Besties!)

Mega Evolve Pokémon will yet to upcoming appeared

• Mega Venusaur
• Mega Blastoise
• Mega Beedrill
• Mega Pidgeot
• Mega Alakazam
• Mega Slowbro
• Mega Gengar
• Mega Pinsir
• Mega Aerodactyl
• Mega Mewtwo X
• Mega Mewtwo Y
• Mega Ampharos
• Mega Scizor
• Mega Tyranitar
• Mega Swampert
• Mega Sableye
• Mega Sharpedo
• Mega Camerupt
• Mega Altaria
• Mega Banette
• Mega Glalie
• Mega Salamence
• Mega Rayquaza
• Mega Lopunny
• Mega Gallade
• Mega Diancie

 

[Fan of Jarrus]

Mega Diancie and Mega Blastoise have appeared in the anime.

 

[swiftgallade46]

Mega Diancie and Mega Blastoise have appeared in the anime.

I think the OP is referring to non-movie and non-special appearances unless I’m missing a point where these two debuted. Otherwise, they’ve all appeared.

 

[PkmnTrainerV]

Mega Altaria appeared as Ash-Greninja's first opponent in Kalos league.

 

[Dogasu]

Mega Mewtwo Y got a whole movie to itself.

 

[EternalPokéFanGirl]

Even if all those Megas appeared in movies and specials I still want to see them in the main anime, especially Mega Gengar .

 

[Greninjaman]

At this point, I doubt all those Megas will be appearing. Sure Mega Lucario appeared, but that's only really because of the fact that Korrina has one.

 

[Handy Man]

Mega Altaria appeared as Ash-Greninja's first opponent in Kalos league.

Incorrect. Altaria did appear in the Kalos League as Ash’s first opponent, but it did not mega evolve.

 

[Silktree]

At this point, I doubt all those Megas will be appearing. Sure Mega Lucario appeared, but that's only really because of the fact that Korrina has one.

I'm pretty sure that Korrina came back for Mega Lucario, rather than the other way around. They probably wouldn't have bothered if Lucario had a Gigantamax form (which might still happen).

The only truly popular Mega Evolution is Mega Charizard X, but it's all about Leon's Gigantamax Charizard these days. Still, any of the Kalos characters might use a Mega Evolution. Mega Scizor for Wikstrom?

 

[Tom1291]

Now Mega Alakazam is now debut in JN084.