Pokémon Sun & Moon Base Set Guide: Solgaleo GX, Lunala GX, and the GX Era Launch

Sun & Moon base set launched the GX mechanic in February 2017. Anchored by Solgaleo GX and Lunala GX — the first GX cards in the TCG — it's a foundational expansion of an entire era.

Here's the 2026 buyer's guide.

What makes Sun & Moon base set different

Three structural reasons SM base is foundational:

1. First GX cards — Solgaleo GX and Lunala GX launched the GX mechanic.
2. Era-launch supply discipline — early SM product had tighter print runs.
3. Pre-2020-boom era cards — SM cards became collector targets retroactively as the hobby expanded.

The chase cards

Tier 1: Solgaleo, Lunala, and chases

• Solgaleo GX Full Art — the iconic chase.
• Lunala GX Full Art — companion chase.
• Charizard GX promos and adjacent SM-era chases — premium tier.
• Other GX cards — collectible secondary tier.

Tier 2: GX cards

• Other GX cards in the main set.
• Secret Rares.

Tier 3: Standard rares

• Standard Rare Holos.

Sealed product holds

SM base sealed product (booster boxes, ETBs) has appreciated significantly. Era-launch foundational status anchors sealed value.

Grading priorities

PSA dominates. CGC has presence. Common condition issues:

• Centering on Full Arts.
• Edge whitening on dark borders.
• Print lines on holo surfaces.

What to chase in 2026

Building an SM base PC priorities:

1. Solgaleo GX Full Art in PSA 10 as the foundation.
2. Lunala GX Full Art as the companion chase.
3. A Secret Rare GX card for the parallel slot.
4. Sealed booster box or ETB as the sealed-product hold.

Time horizons

SM base is long-rotation-out long-term hold material. Era-launch foundational status anchors the long-term thesis.

How AI pre-grading helps

Full Art centering is variable. AI pre-grading screens each card before submission.

CardSense AI supports Sun & Moon base set with predicted grades and live PSA / CGC comps.

The bottom line

Sun & Moon base launched the GX mechanic and the SM era. Solgaleo GX Full Art is the foundation, sealed product is the long-term hold. Buy what you love, pre-grade everything, hold long-term.