オルタージェネシス (Alter Genesis): Japanese Pokémon TCG Set Guide (SM12)

オルタージェネシス (Alter Genesis) is the twelfth and final main expansion of the Sun & Moon Era in the Japanese Pokémon TCG. Released on 6 September 2019, it brings together the creation trio of Sinnoh in one of the most powerful Tag Team GX cards ever printed — Arceus & Dialga & Palkia-GX. The set serves as the grand finale for the Sun & Moon main expansion series.

By PulloraX · Published 30 October 2026

Set overview

Set code: SM12
Japanese name: 拡張パック オルタージェネシス
Cards: 95 + secret rares
Release date: 6 September 2019
Era: Sun & Moon
Series type: Main expansion (拡張パック)

Alter Genesis capped off the Sun & Moon main expansion line with a celebration of Legendary and Mythical Pokémon. The set featured some of the most competitively impactful Tag Team GX cards, with Arceus & Dialga & Palkia-GX's Altered Creation-GX attack proving to be one of the most powerful GX attacks in the game.

Key cards

Tag Team GX: Arceus & Dialga & Palkia-GX (Dragon type) is the crown jewel — its Altered Creation-GX attack gives all your Pokémon +30 damage and an extra prize card on knockouts for the rest of the game. Mega Lopunny & Jigglypuff-GX (Colorless type) and Togepi & Cleffa & Igglybuff-GX (Fairy type) round out the Tag Teams. All appear in RR, SR, and HR versions.

GX cards: Oricorio-GX, Wishiwashi-GX, and others expand the GX pool for competitive and casual players.

Secret Rares: The Arceus & Dialga & Palkia-GX HR (Rainbow Rare) and SR (Full Art) are the premier chase cards. UR trainer cards complete the secret rare lineup.

What is in the box

A Japanese SM12 Alter Genesis booster box contains 30 packs of 5 cards each. As the final main expansion set, it offers a large and varied card pool. SR and HR pull rates average roughly one per box.

Shop this set

• Alter Genesis SM12 Japanese Pokémon Booster Box

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