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
Base Set Main Series Expansion 102 January 9, 1999 BS 2 Jungle Main Series Expansion 64 June 16, 1999