If you have a pokemon with the Static ability in the front of your party, it increases the chance of finding a wild electric type pokemon. This is EXTREMELY useful for finding rare electric types, like Pikachu in the Safari Zone.
Battle Steven, the former champion.
After beating the Elite Four, a new part of Meteor Falls opens up. It is in the northwestern corner where you found Iron Tail. A new cave was made and you'll find Steven in it. His Pokemon are in the high 70's.