>>48977405Whole series? I'll break it down up until the last gen I played.
>Gen 1Venusaur is fantastic throughout the entire game. Victreebel is better against players/Stadium.
>Gen 2Typhlosion in game. Meganium against players. All six are meh at best against players.
>Gen 3Swampert. Honorable mentions to Charizard and Blaziken.
>Gen 4Swampert. Infernape comes close.
>Gen 5Speed boost Blaziken
>Gen 6Speed boost Blaziken
Charizard is legit in gen 3. Against the BF it's a fast petaya nuker with blaze. Against players it shits on Skarmory, Blissey, Tyranitar, and Swampert with the right prediction and flies over spikes. It's hard to get in sometimes and is extremely prediction heavy - if not the most, but it can potentially end the game off a single read.
Also the best starter is Swampert by far. He does everyrhing you could possibly want in a water type regardless of if you're playing single player or multi. In fact, he does everything you could possibly want in general. He's the GOAT of starters and only a fool would say otherwise.