As you play on in the game and explore more areas, somewhere you should find an NPC who will give you "Old Rod". Find a body of water, press a or something and you can go fishing. When a water Pokemon appears, your overworld Sprite will have an exclamation mark over his head. Automatically it will switch into battle mode and there you have it.
Whirlpool isn't in Pokemon Yellow Version.
Pokemon Yellow does not have meowth and it can only be obtained by trade.
pikachu
you can find fresh water at celdon city pokemart on the top floor in the vending machine
Noctowl doesnt exist in Pokemon yellow, blue, or red
Lavender Town
Pokemon mart in Celadon City
at the top of the tower your find him
you get him at the start
Yes, they are bad against water Pokemon. Rock is also bad against water Pokemon
The Yellow Forest route on the Pokewalker? Pikachu. Only Pikachu.
Have ALOT of Water and Ghost Pokemon