Around how many sets are there with the base set’s Charizard artwork (holo and non-holo)?
Just speaking of sets, @thymeee nailed it.
But for all English variations, there are:
- Thin 1st edition Base Set Holofoil
- Thick 1st edition Base Set Holofoil
- Shadowless Base Set Holofoil
- ©1999 unlimited edition Base Set Holofoil
- ©1999-2000 unlimited edition Base Set Holofoil
- Base Set 2 Holofoil
- Legendary Collection Holofoil
- Legendary Collection Reverse Foil
- Legendary Collection non-Holo (Lava Theme Deck)
- CoroCoro Jumbo non-Holo (Japanese April 2000 CoroCoro magazine release, but it is in English)
- Evolutions Holofoil
- Evolutions Reverse Holo
- Evolutions Holofoil Prerelease stamp
- Evolutions Holofoil Prerelease STAFF stamp
- Celebrations Confetti Holofoil
- Celebrations Metal Golden (Ultra Premium Collection Box)
- Stormfront Secret Rare Holofoil
And there are some misprinted versions, like the grey stamp 1st edition Base Set or green flame Evolutions Holofoil. And I might have missed some tbh, since I made this list out of the top of my head rather quickly just yet.
One additional Japanese exclusive variant is the one from the 25th Anniversary Special Deck.