How do these pokemons evolve with friendship?

how do pokemon on LeafGreen/FireRed evolve with friendship(Chansey-Blissey,Golbat -Crobat,and Togepi-Togetic?)

Hi,

In order for some Pokemon to evolve you need Friendship meaning that you must let your Pokemon battle, groom it and feed it RARE CANDY. You can check your pokemon's tameness by going to the tameness tester in Goldenrod city.

Hope that helps.

u have to keep them in your party 4 a while. Sometimes giving them items helps 2.

I know an absolutely brilliant way to make it happy fast. Buy Protein, Iron, Carbos, Zinc, Calcium and Hp up. Use them on your chosen Pokemon, one item at a time. Eventually, your Pokemon will be so happy with you using items on them, they will evolve. If you have fed your Pokemon at least one of each item and nothing has happened, raise your Pokemon's level by one and hopefully that will trigger it to evolve. If it is still a bit stubborn about evolving, give it one of each item once more and raise it to the next level again. That should definitely do the trick.