Gen 6

My first game was Pokémon Let's Go Pikachu, so I guess Gen 7

Let's go eevee then scarlet

6 with Alpha Sapphire (pretty sure I really started with like base XY or Legendary Treasures cards though..?)

I started with Gen 8, Sword and Shield :]

Technically it was Gen 1 with Pokemon Stadium, but my first mainline game was Pokemon Y, which is Gen 6.

Gen 6. I started with X.

Gen 5, Unova. Pokémon White

That is not a lizard, Snivy broke the chain completely. *sproing* gen 5

Gen 7