SM12: Alter Genesis Master Set Checklist & Cost

Variants in the SM12: Alter Genesis master set

The SM12: Alter Genesis master set has only two variant families: Normal with 78 slots and Holo with 39. There are no reverse holos, no stamped versions and no edition prints to track, so every card appears once, in whichever finish it was printed. For a collector, that means the master set checklist matches the card list one to one. The holo slots are the ones to look at closely, since they are where the set's rarer cards sit.

Where the SM12: Alter Genesis master set's cost sits

The SM12: Alter Genesis master set cost is concentrated in a small group of slots. Its ten most valuable slots hold 71 percent of the master set's total value, while the lower-value half of the priced slots adds up to only 4 percent. Holo slots carry 89 percent of the total and normal prints just 11 percent, even though normal prints make up two thirds of the checklist. Of the 117 slots, 114 carry a price, as of October 24, 2026. Most of the binder sits in the lower-value tier, and the weight of the total is at the top.

Written from market data as of October 24, 2026; the tables update live.

• Top 10 slots73%
• Holo slots89%
• Normal slots11%
• Lower-value half3.9%

Shares of the master set’s priced value, from the slot prices in the checklist above.

Hardest SM12: Alter Genesis master set slots

Five Super Rare holos make the SM12: Alter Genesis master set hard to finish: Mallow & Lana, Cynthia & Caitlin, Red & Blue, Naganadel & Guzzlord GX and Arceus & Dialga & Palkia GX, in that value order. Together they hold 55 percent of the master set's total value. None of them is a side variant, since each is the card's main print, so the difficulty here is plain card value rather than a hidden variant slot. Finishing the set largely comes down to landing these five.

Most valuable slots

1. 1Mallow & Lana · Holo · Super Rare$150.99
2. 2Cynthia & Caitlin · Holo · Super Rare$142.34
3. 3Red & Blue · Holo · Super Rare$120.01
4. 4Naganadel & Guzzlord GX · Holo · Super Rare$100.32
5. 5Arceus & Dialga & Palkia GX · Holo · Hyper Rare$60.89
6. 6Mega Lopunny & Jigglypuff GX · Holo · Hyper Rare$48.02
7. 7Mega Lopunny & Jigglypuff GX · Holo · Super Rare$46.95
8. 8Arceus & Dialga & Palkia GX · Holo · Super Rare$43.76
9. 9Guzma & Hala · Holo · Super Rare$28.88
10. 10Naganadel & Guzzlord GX · Holo · Super Rare$20.01

How the SM12: Alter Genesis master set compares

At 117 slots, the SM12: Alter Genesis master set is about 1.6 times the Sun & Moon era median of 73 slots, so it is a larger job than a typical set of its time. By master set value it ranks 8th among 36 comparable sets in the era. Its neighbours are bigger or higher-value: the previous set, SM11b: Dream League, has 75 slots and a higher-value master set, and the next, SM12a: TAG TEAM GX: Tag All Stars, runs to 353 slots with a higher-value master set as well.