Pokémon Red & Blue: Beat Lt. Surge — Vermilion City Gym, badge 3
What opens up at this point in the game, and everything you can catch by now that you couldn't before.
✓ the Old Rod (Vermilion Old Rod House)
Now usable
- Old Rod — the Old Rod (Vermilion Old Rod House)
Newly reachable
TMs you can now pick up
- TM24 Thunderbolt — Vermilion City Gym