Location from pokemon-kanto by
Lt. Surge's Electric-type gym in Vermilion City — a military-themed battlefield where Pikachu finally beat Raichu by refusing to become one.
Vermilion Gym awards the Thunder Badge. Lt. Surge runs the gym as a boot camp for Electric-type specialists and has a particular taste for humiliating Pikachu owners by showing off his fully evolved Raichu. The battle that defined the first season — Pikachu's speed-based rematch win against Raichu after refusing the Thunder Stone — happened here.
A cavernous yellow-and-black interior with oversized Poké Ball switch puzzles that challengers must solve to reach the arena. The battlefield is a flat metal plain with lightning bolts painted on the ground. Surge's trainer stand sits at a raised platform flanked by two American flags.