Your Golbat needs to be happy with you. If you din't have one you can catch them in the Ice Path (or any other cave that you know has a Golbat)
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meganium, crobat, gomel, lanturn and heracross. hope this helped
It doesn't evolve at level you have to max its friendliness and it evolves into Crobat.
Electrode is the fastest Pokemon there is followed by Jolteon then Aerodactyl. The fastest 2nd generation Pokemon is Crobat.
Train a Golbat/Crobat. Or catch Entei with the Master Ball and randomly run into Raiku for the first time (Full HP) and catch with an Ultra Ball.
in soul silver