BREAKthrough Set Guide

Overview

BREAKthrough is the eighth XY expansion: 162 cards up to the printed total and two secret-rare Mewtwo-EX above it (163 and 164).

A Pokémon BREAK evolves from the Pokémon of the same name, is printed sideways, and keeps that Pokémon's attacks, Abilities, Weakness, Resistance and Retreat Cost. BREAKthrough prints six of them, from Chesnaught BREAK to Noivern BREAK. Mewtwo is the other story: Mewtwo-EX and M Mewtwo-EX each come as two different cards, and between regular, full-art and secret-rare printings the set has ten Mewtwo cards with a rule box.

Cards and rarities

BREAKthrough has 164 cards. Every card shows its number over the printed total along the bottom, as in "1/162", next to the set code BKT.

The printed total is 162, so the 2 cards from 163 to 164 are secret rares. The catalog also files one more card under this set with a letter after the number: Professor's Letter (146a). It is an alternate printing outside the numbered set, so it isn't counted here. Set completion in TurnZero HQ counts a set against its printed total and keeps the secret rares apart, so finishing the main set and chasing the cards above it read as two separate goals. How set completion works →

Headline Pokémon

Pokémon-EX, Mega Evolutions and the first Pokémon BREAK:

M Mewtwo-EX

BREAKthrough #64

210 HP Mega Evolution. Psychic Infinity does 10 plus 30 for each Energy attached to both Active Pokémon, unaffected by Weakness.

Mewtwo-EX

BREAKthrough #62

170 HP. Shatter Shot does 30 for each Psychic Energy on it; Damage Change swaps its damage counters with the Defending Pokémon's.

Chesnaught BREAK

BREAKthrough #12

190 HP BREAK. Tough Hammer does 160, 30 to itself and 30 to one of your opponent's Benched Pokémon.

Trainers worth knowing

Two Supporters, both also printed as full arts:

Brigette

BREAKthrough #134

Supporter. Put 1 Basic Pokémon-EX or 3 Basic Pokémon other than Pokémon-EX from your deck onto your Bench.

Giovanni's Scheme

BREAKthrough #138

Supporter. Choose one: draw until you have 5 cards in hand, or your Pokémon's attacks do 20 more damage to your opponent's Active Pokémon this turn.

The chase card: Mewtwo-EX

Mewtwo-EX

BREAKthrough #164

Rarity Rare Secret

Card number 164/162

Market price, October 22, 2026 $208.37

Illustrator Mitsuhiro Arita

BREAKthrough's chase card is Mewtwo-EX, numbered 164/162, a Rare Secret, illustrated by Mitsuhiro Arita, at $208.37 on October 22, 2026.

The Rare Secret Mewtwo-EX (163/162) was second at $206.75 and the Rare Ultra M Mewtwo-EX (160/162) third at $148.01.

Mewtwo-EX is printed six times in BREAKthrough. The Rare Holo EX (61/162) was $11.67. The Rare Holo EX (62/162) was $13.64. The Rare Ultra (157/162) was $82.44.

Every Mewtwo-EX in BREAKthrough

Only the exact version is worth its price. The number at the bottom of the card and the rarity symbol beside it tell you which one you pulled. Reading the number and rarity symbol →

Chase cards and prices

Mewtwo takes the top six places, the two secret-rare Mewtwo-EX first.

These are each card's headline TCGplayer market price on October 22, 2026. Prices can move a long way, most of all in a set's first months, so treat them as a snapshot. Each card's page shows today's price for every variant and its 90-day chart. How Pokémon card prices work →

What a complete set costs

One copy of every card in BREAKthrough, bought as singles, cost $1,373.09 on October 22, 2026. That is the 7th most expensive of the fifteen sets in the XY series.

The three most valuable cards, two Mewtwo-EX cards and M Mewtwo-EX, come to $563.13, or 41% of the total. Without them the set costs $809.96. Of the 164 cards, 131 were under $2.00, together $60.74; the other 33 add up to $1,312.35.

Left out: one alternate printing the catalog files under this set with a letter after the number, Professor's Letter (146a). They aren't part of the numbered 164.

Each card is counted at its cheapest priced variant, a Normal copy rather than a Reverse Holofoil where both exist, at its TCGplayer market price. This is what it costs to buy the set as singles. It is not what opening packs returns, and not what a complete set would sell for, which after fees and the many cards worth cents would be noticeably less.

Playing it

No BREAKthrough card carries a regulation mark, so none is Standard-legal as printed. Standard has allowed only the H, I and J marks since April 10, 2026. Every card in BREAKthrough is legal in Expanded, which takes every set from Black & White on.

A reprint with a legal mark makes older printings of the same card legal again, so check a card's name before you rule it out.

Standard, Expanded and deck building rules →

Frequently Asked Questions