After traveling along Routes 15 through 12, you can make your way to the other side of Vermilion City by taking Route 11. There are a few Trainers to battle and lots of tall grass full of Pokémon. The Trainers are using Flying-, Grass-, or Fire-type Pokémon, so be prepared to battle those types.
Cross Route 11 to Vermilion City, and wake the sleeping Snorlax
|Snorlax in the game, and at level 50, it's only a few levels away from learning Hyper Beam, its best attack. Snorlax comes with Rest (which puts it to Sleep to refill its HP) and Snore (which does damage while Snorlax is asleep), a neat little combo that makes this high-HP Pokémon hard to beat. It has some interesting early moves, too, but you'll need to raise a new Snorlax from an egg to get them.|
You can heal up in Lavender Town if you need to, then head west through Route 11, the last unexplored stretch of East Kanto. Outside of a few easy Trainers, there's nothing here. But at the end of the road (in Vermilion City, you'll find that sleep Snorlax.
Tune your radio to the Pokémon Flute station, then press while you're standing next to Snorlax to wake it up. It's at level 50, and it constantly gains health back through equipped Leftovers (which are yours if you catch it). Be careful not to K.O. it or it's gone for good! Whittle down its health and use Heavy Balls if you have them. When Snorlax is out of your way, you'll be able to enter Diglett's Cave, the only route to West Kanto.
- Berry (Tree)
- Revive (Hidden) under Berry Tree in the hedge