>>33624105>Useless1- Bulbasaur resists Surge, Erika and the optional fighting gym
2- Super Effective against Brock, Misty, Giovani, Bruno and Loreli.
3- Useful in Rock Tunnel, Digglet Tunnel, SS.Anne, Sevii Islands, Seaform Islands, Victory Road, Powerplant, and the Routes with Rock/Ground and Water trainers.
4- Sleep Powder is a good pokemon catching move as well as good at disadvantages.
Also, Squirtle is arguably the easy mode.
Squirtle learns Dig and Ice beam that counter its only 2 weaknesses while Bulbasaur had 4 and way to counter any of them. Therefore you can use a good leveled Squirtle against Surge and Erika.
Squirtle also rapes Lance and Blue, while the other two starters don't even come close to that.
Squirtle is also the most popular choice for speedruns while Bulbasaur is considered the worst.
You know some reading and research doesn't hurt, do it sometime.