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>gen 1: Charizard is your starter and your game mascot in RGB, it's your "secondary starter "in Yellow too
>gen 2: Charizard with worse movepool and without flying type is your starter in GSC, it's the only pokemon the two final bosses (Red and Lance) have in common too
>gen 3: No Charizard in RSE, but see gen 1 (because we remade gen 1, it's FRLG now)
>gen 4: No Charizard in DPPt, but see gen 2 (becase we remade gen 2, it's HGSS now)
>gen 5: Charizard is a bridge in a region without Charizards in both BW and B2W2
>gen 6: Charizard is your "secondary starter", it's one of the only two pokemon with two Mega-evolutions too, all in XY. No Charizard in the remade RSE (ORAS), tho.
>gen 7: Charizard is a HM Fly in a region without Charizards in both SM and USUM, it's your rival's "secondary starter" in USUM too, and it's your "secondary starter" again because we reimagined gen 1 and made Let's Go PikaVee
>gen 8: Charizard is the only Kanto starter native of the new region and the only one with a Gigantamax form too, it's the emblem that represents top tier of cuisine (Charizard Curry), the ace of the final boss (Leon) and also a pose everyone loves and does and is even required for players that want to evolve a pokémon completely unrelated to Charizard (Milcery), all in SwSh