Where it comes from
List of Japanese Pokémon Trading Card Game expansions - Bulbapedia Bulbapedia (community wiki), via Internet Archive snapshot 2026-07-23 · 19 June 2026 Open the original ↗
The line in the source
GX Battle Boost Part of Ultra Prism 114 (11) October 20, 2017 ; GX Ultra Shiny Hidden Fates's Shiny Vault 150 (100) November 2, 2018