East Province (Area Three), West Province (Area One), West Province (Area Three) — 3 locations on the interactive map.
New Mauville — 1 location on the interactive map.
Kanto Power Plant, Route 10 — 2 locations on the interactive map.
Olivine City, Route 10, Team Rocket HQ — 3 locations on the interactive map.
Voltorb → Electrode (Level 30)