Cosmic Eclipse: How to Identify Cards From This Set

• Cosmic Eclipse is the twelfth and last main expansion of the Sun & Moon Series.
• It was the largest English-language set released up to that point, with secret rares — including Rainbow Rares — numbered past the 236-card main set.

• Rainbow Rare / Secret Rare: Cards numbered above the main set's highest number, 236/236, are secret rares; this range includes Rainbow Rare GX cards with multicolor foil borders.

Japanese release September 6, 2019 as "Alter Genesis"; English release November 1, 2019. Exact per-rarity secret-rare number ranges (e.g. which numbers are Rainbow vs. Gold Secret Rare) came from a secondary card-database source (cardrake.com) rather than Bulbapedia or Pokemon.com, since those did not spell out the breakdown in the pages fetched.

• Bottom-left or bottom-right corner: the set symbol and the collector number (e.g. 4/102) tell you the set; older cards have no symbol at all, which itself narrows them to Base Set.
• Left of the number: a 1st Edition stamp, if present, sits below the art on WOTC-era cards.
• Regulation mark (a letter in a box near the bottom, D through H so far) dates modern cards to a two-year window.
• Back of the card: the blue Poké Ball back has changed little since 1999; a washed-out, blurry or wrongly colored back is the first sign of a fake.

Lay the card flat on a dark surface in daylight, straight on, with the whole card in frame, then a close-up of the bottom edge where the set symbol, number and any edition stamp sit. Tilt holo cards under the light for a second shot to show the foil pattern. Photograph the back too. The app reads the card and set; the edition and rarity checks above tell you which version you have.