Go to the Safari Zone near Lilycove City. Go to the grass patch nearest to the entrance and walk in it or use Sweet Scent. After a few tries, Pikachu should appear (that is the only place to get Pikachu in Ruby)
pikachu
pikachu
PIKACHU
thunder stone
Put 2 pikachu in the day care
Pikachu and eevee are a couple.
You can't, you have to breed Pikachu.
Yes you can, you can find them in the Safari zone.
yes
You can find a pikachu while in the safari zone. Pikachu also cannot be found anywhere else.
You can find Pikachu in the Safari Zone (Southeast and Southwest). Gotta Catch 'em All!
get shaymin on your team and then the pikachu will disappear.