Pokémon BREAKthrough, released in November 2015, marked the beginning of the XY BREAK block and introduced the brand-new BREAK Evolution mechanic. While the set showcased the debut of this gold-bordered evolution style, it quickly became synonymous with its heavy emphasis on Mewtwo and the introduction of multiple Mega Mewtwo EX variants. Players at the time gravitated toward its competitive depth, with Psychic Infinity Mewtwo builds shaping entire tournament strategies across the 2015–2016 format.
Collectors, meanwhile, were drawn to its dazzling Full Arts and Secret Rares, which elevated the visual presentation of Mewtwo and Houndoom cards to new heights. The blend of competitive viability and high-end chase pieces made BREAKthrough one of the most balanced expansions of the XY era. Nearly a decade later, its sealed boxes, packs, and standout singles remain highly desirable, securing its reputation as a set with lasting impact for players, investors, and collectors alike.
12. M Houndoom EX #22
M Houndoom EX #22 was valued for its scaling damage potential, making it dangerous in the right deck. Its presence gave Fire-focused strategies a legitimate closer during the XY metagame. The artwork emphasizes the intensity of Houndoom’s Mega form, which made it stand out visually. Collectors still appreciate it as one of the best non-Mewtwo cards in BREAKthrough.
11. Houndoom EX #153
This Full Art Houndoom EX is remembered for its aggressive foil treatment and bold red-orange palette. The card was disruptive in play due to its deck-discarding ability, which gave it utility against slower builds. Its rarity made it a must-have for collectors aiming to complete the Houndoom line. Over time, it has become one of the most recognizable cards of the set outside the Mewtwo chase pool.
10. M Glalie EX #156
M Glalie EX #156 offered a surprise Full Art addition for collectors, with icy visuals and strong texturing. Players experimented with its ability to swing for massive damage, though it remained more of a rogue option. Its unexpected popularity gave Glalie a standout moment in the XY era. Today, it holds appeal for collectors who prefer unique Mega cards outside of the headliners.
9. M Mewtwo EX #64
This Mega Mewtwo became feared for its ability to bypass effects on opposing Pokémon. Competitive players valued it as a reliable attacker capable of swinging matchups in its favor. The card’s artwork captured an explosive moment of battle, making it highly display-worthy. Its dual appeal to both players and collectors helped it climb in long-term demand.
8. M Mewtwo EX #63
M Mewtwo EX #63 featured Psychic Infinity, a scaling attack that could overwhelm opponents regardless of deck type. It quickly emerged as one of the most played cards from the set, defining multiple tournament builds. Collectors sought it not only for its strength but for its complementary pairing with the alternate Mega Mewtwo. Even years later, it remains one of the expansion’s most iconic pulls.
7. Mewtwo EX #157
Mewtwo EX #157 stood out as a Full Art that blended competitive versatility with striking visuals. Its ability to swing momentum with Damage Change gave it relevance in tournament play. The textured foil highlighted Mewtwo in a bold stance that made it a collector favorite. Its combination of play value and aesthetic has cemented it as a standout card from BREAKthrough.
6. Mewtwo EX #158
This card offered another Full Art interpretation, adding depth to the set’s lineup of Mewtwo variants. Collectors often pursued it to build a complete showcase of every Mewtwo EX artwork. The foil treatment and pose gave it a distinct look compared to its counterparts. It’s remembered as one of the pieces that fueled the “Mewtwo set within a set” phenomenon.
5. M Houndoom EX #154
As the Full Art version of Mega Houndoom, this card delivered one of the most dramatic foil treatments in BREAKthrough. Its fiery detail made it a centerpiece for Houndoom fans and XY collectors alike. The rarity ensured it was harder to pull, raising its long-term desirability. For many, it’s the definitive Houndoom card of the era.
4. M Mewtwo EX #159
M Mewtwo EX #159 brought collectors a highly textured Full Art featuring one of Mewtwo’s most dynamic illustrations. Its rarity made it an immediate chase card during release. Competitive players also valued it as part of the dominant Mewtwo builds of the time. Even today, it carries strong prestige as one of the set’s top-tier pulls.
3. Mewtwo EX #164
This Secret Rare became a centerpiece chase due to its gold borders and limited availability. Collectors immediately targeted it as one of the most prestigious Mewtwo EX variants. Its competitive use added another layer of value during its peak playability. The combination of scarcity and recognition keeps it among the most expensive cards in the set.
2. M Mewtwo EX #160
M Mewtwo EX #160 fused tournament-level strength with Full Art showcase quality. Psychic Infinity’s dominance made it a meta-defining card across multiple builds. Collectors also prized the card for its imposing artwork and foil treatment. As both a competitive staple and a collector’s gem, it represents the height of the BREAKthrough Mewtwo chase.
1. Mewtwo EX #163
The crown jewel of BREAKthrough, Mewtwo EX #163 remains one of the most coveted XY-era cards. Its Secret Rare status combined with stunning Full Art design made it the hardest and most exciting pull. Both players and investors targeted it, cementing its reputation as the set’s defining card. Nearly a decade later, it continues to anchor the value of BREAKthrough singles.
BREAKthrough’s legacy lies in its incredible lineup of Mewtwo and Mega EX cards that blended competitive relevance with collector appeal. Between playable dominance and unforgettable foil artwork, the set remains one of the XY era’s strongest for long-term collecting. If you’re chasing iconic cards from this period, these twelve stand at the top.
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