It all depends on how you raise it. There really isn't a such thing as the strongest Pokemon, it depends on its moves, level, stats, and how it was raised.
Caterpie?
Nope, it is certainly not caterpie. I would say it is Mewtwo. But Dragonite, Tyranitar, the legendary birds and the legendary dogs are good too.
depends what level
Debatable
You can catch Moltres at Mt. Ember Peak in FireRed.
THE yellow pokemon :) lol
If you train your pokemon or use cheats you can be the best trainer.
Charmander.
the best Pokemon in fire red is lugiaAnswerthe best Pokemon in fire red is lugia
There is no "best" Pokemon because every Pokemon has its own weaknesses and strengths against other types of Pokemon,
In Pokemon firered you can't, but in Pokemon leafgreen you can get it then trade it to Pokemon firered.
there all exactly the same
There is no Pokemon convention in firered.
To get Pokemon firered on PC download a vba and Pokemon firered ROM