Where it comes from
List of Pokémon Trading Card Game expansions - Bulbapedia (English sets) Bulbapedia (community wiki), via Internet Archive snapshot 2026-10-04 · 12 September 2026 Open the original ↗
The line in the source
XY—Kalos Starter Set Special Expansion 39 November 8, 2013 KSS XY1 XY Main Series Expansion 146 February 5, 2014