Originally Posted by 321Ben
I think it was meant to be Sunny Day so you don't need to charge up Solarbeam.
Weather wasn't brought in until Gen II. Blue is Gen I.
Bulbasaur is a good mon to solo-run with. Because it's getting all the EXP, it's easy to evolve it before Misty. The only problem I can see is the fact that your rival will have Charizard eventually, whose types will BOTH be SE. Also, he'll have Alakazam (Psychic > Poison) and Pidgeot (Flying > Grass).