Description, catalog fields, rules text, and how it plays—in one place.
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Mega Evolution rule: When 1 of your Pokémon becomes a Mega Evolution Pokémon, your turn ends. Pokémon-EX rule: When a Pokémon-EX has been Knocked Out, your opponent takes 2 Prize cards.
Abilities, attacks, weakness & resistance
You may discard all Fire Energy attached to this Pokémon. If you do, this attack does 80 more damage.
Other cards from BREAKthrough
Mewtwo-EX (Holofoil)
Mewtwo-EX (Holofoil)
Giovanni's Scheme (Holofoil)
Brigette (Holofoil)
M Mewtwo-EX (Holofoil)
M Mewtwo-EX (Holofoil)
Mewtwo-EX (Holofoil)
Mewtwo-EX (Holofoil)
M Glalie-EX (Holofoil)
Glalie-EX (Holofoil)
M Houndoom-EX (Holofoil)
Houndoom-EX (Holofoil)
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M Houndoom-EX (xy8-22) is a Fire-type Mega Evolution Pokémon-EX from the BREAKthrough set printed as a Rare Holo EX. Its attack, Inferno Fang, does 80 damage and can deal an additional 80 damage if you discard all Fire Energy attached to it. As a Mega Evolution and Pokémon-EX it ends your turn when evolved and gives your opponent two Prize cards if knocked out, affecting high-risk high-reward deck roles.
Catalog pricing data as of 23 Apr 2026, 00:03