Use a Thunderstone on it. There is one in Sunyshore City. You can also look for some in The Underground.
you can't evolve pikachu in the game but if you trade a pikachu from red or blue you can evolve it with a thunder stone but if you try to evolve the pikachu you get at the begging of yellow it just upsets pikachu
everstone
You have to trade to another game to make it evolve.
Give it happiness
no it cant
No, you must trade the certain Pokemon that need to be traded to evolve to make them evolve.
you have to make him happy. hope this helped!
Yes, it just need friendship so it can be able to evolve then after it turns to Pikachu u need a Thunder stone to make it evolve
you have to give it something and then level it up and it will evolve in Pokemon pearl
you have to make it happy you can do this by massages and giving it proteins you evolve pichu with happiness and freindship.you can also give him beris that make it frendlier
You'll need to make it have high happiness/friendship during the day to make it evolve into Roselia.
Pachirisu CANNOT evolve at this time. Maybe soon the developers will make a Pachirisu evolution.