>>49446578No, actually. This is the very first time in a core game where Charizard isn't usable to any capacity whatsoever, for the very first time in the franchise's quarter of a century ongoing run.
All prior games still let you obtain Charizard to use it even if you had to transfer or trade for it, Legends is the first time where "not being in the regional dex" means "not allowed to use, period".