Part 5: Beat Lt. Surge — Vermilion City Gym, badge 3

the Old Rod (Vermilion Old Rod House)

Beat Lt. Surge — Vermilion City Gym, badge 3 opens 1 area. There are 3 trainers standing in it. The fight at this checkpoint is Lt Surge.

Where to go

1. Vermilion City Gym

   Trainers: ★ Lt Surge Lv 24, Rocker Lv 20, Sailor Lv 21

★ Lt Surge — Vermilion City Gym

3 Pokémon · level cap Lv 24 (every cap) · Lt Surge’s own page

	Pokémon	Ability & item	Moves	Base stats
	Voltorb Lv 21 Electric		Tackle Screech Sonic Boom	HP40Attack30Defense50Sp. Atk55Sp. Def55Speed100Total330
	Pikachu Lv 18 Electric		Thunder Shock Growl Thunder Wave Quick Attack	HP35Attack55Defense40Sp. Atk50Sp. Def50Speed90Total320
	Raichu Lv 24 Electric		Thunder Shock Growl Thunder Wave	HP60Attack90Defense55Sp. Atk90Sp. Def80Speed110Total485

Everything you can have caught by this checkpoint · Open the interactive guide

It also doesn't say when Kanto Underground Path opens up, so it is in no part above; it has its own route page.