>>35369169People respond like there are no spin-offs in every generation...
Anyway, my pick is Generation 1. A lot of games came out back then, however most of them are not good.
RB have nice Pokedex but the games themselves are archaic and boring at times. Their remakes are much better.
TCG is too random and repetitive for my taste. Its sequel is much better.
Pinball has really annoying ball physics. Its sequel is much better.
Stadium has its charm like many other titles but it gets boring really fast. Its sequel is much better.
Hey You, Pikachu... you know.
Snap is genuinely great, although a little too short. Yellow has amazing sprites so it gets a good grade. Puzzle League has good soundtrack, nostalgia-inducing graphics and addicting multiplayer. These three are worth playing, in my opinion. Them and RB if you dislike Pikachu and don't mind worse sprites.