Topsun cards were released after the Japanese No Rarity Base Set, though. The release orders of the first few Pokémon cards were:
- September 1996: Bandai Carddass: parts 1 & 2
- October 1996: Pokémon TCG: CoroCoro Comic Pikachu & Jigglypuff, and Japanese No Rarity Base Set five days later
- March 1997: Topsun (no numbers blue backs)
@shizzlemetimbers dug up some information to back this up, including when Topsun obtained a Pokémon license (1997) according to their own website, and how Topsun isn’t featured in any CoroCoro Comic in 1995 nor 1996.
Greetz,
Quuador