Des

The worst starter is and always will be Pikachu in Yellow and yes, it's a legit Gen 1 game and starter. Like sure, Chikorita is bad and all that but here, you're stuck with a weak rat from beginning of original red/blue. It has terrible stats and horrendous moveset and you're facing fully evolved mons with an unevolved weak pokemon before evolite or friendship benefits (the only one here is that you can get a Bulbasaur)

And you're unable to get a Raichu without trade, bc you can't find another Pikachu in this game

They fixed these problems in LGPE by giving partner Pikachu/Eevee better stats, unique moves and friendship benefits, but in Yellow the only purpose of your starter Pikachu is to build friendship with it to get a Bulbasaur and throw it into a box