AttackInferno Fang
You may discard all Fire Energy attached to this Pokémon. If you do, this attack does 80 more damage.

BREAKthrough is a set in the XY series. It was released on November 4, 2015. The printed size is 162. This checklist is longer, at 165 cards. M Houndoom-EX is 154/162, in position 155 of 165 on this checklist. Before it is 153 Houndoom-EX, and after it is 155 Glalie-EX. The listed rarity is Rare Ultra.
M Houndoom-EX is a MEGA EX Fire Pokémon with 210 HP. In the Pokédex this is Houndoom (#229), generation 2 (Johto). The card says it evolves from Houndoom-EX. In this catalog that name is Houndoom (#229).
5ban Graphics illustrated this card. The same name is on 1,629 other cards in the catalog.
Houndoom (#229) has 44 other cards in the catalog. Those other cards are in 30 sets. The other printings with a release date run from 2001 to 2025. The earliest other card is Houndoom 4/75 in Neo Discovery (2001). That card is named Houndoom, while this one is M Houndoom-EX. That card lists 70 HP, and this one lists 210 HP. The rarity there is Rare Holo, and here it is Rare Ultra. Shin-ichi Yoshida illustrated that card, and 5ban Graphics illustrated this one. 41 other cards of Houndoom list a different HP.
The attack Inferno Fang lists 80+ damage. The cost is Fire, Fire. You may discard all Fire Energy attached to this Pokémon. If you do, this attack does 80 more damage. Weakness is Water ×2. Retreat cost is 1. The card text says: Mega Evolution rule: When 1 of your Pokémon becomes a Mega Evolution Pokémon, your turn ends. The card text says: Pokémon-EX rule: When a Pokémon-EX has been Knocked Out, your opponent takes 2 Prize cards.
I keep a set binder for BREAKthrough, meant to hold every card of that set. This card is one slot in the BREAKthrough set binder. A generation binder holds one card of each species. Houndoom can fill a slot in Generation 2 binder (Johto). I still need this card.
You may discard all Fire Energy attached to this Pokémon. If you do, this attack does 80 more damage.
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.
BREAKthrough, in the XY series. It was released on November 4, 2015. The printed size is 162.
154/162. It is entry 155 of 165 in this checklist.
5ban Graphics. The catalog lists 1,629 other cards with that illustrator.
Rare Ultra.
Houndoom #229, generation 2 (Johto).
Inferno Fang (80+).