Pokémon FireRed and LeafGreen/Route 10



Going through Route 9 is necessary to reach Route 10, but it can only be accessed by having a Pokémon that knows Cut. In addition, make sure to pick up Flash from Route 2 before going into the Rock tunnel, 'cause it's going to be dark.

This route is East of Cerulean City, and contains the entrance to the Rock Tunnel. Going through Rock Tunnel may seem like a roundabout route, but it's the only way, as there is a Snorlax blocking Route 12 and the thirsty officer blocking Saffron City will not let the player in.

As a side note, remember to return to this area once you have the ability to Surf, as the waters here will lead you into the Power Plant, and a powerful Legendary!

Professor Oak's Aide
Inside the Pokécenter you will find one of Oak's Aides. Talk to him and, if you have complete data on 20 types of Pokémon, he will reward you with an Everstone, which can be held by a Pokémon to prevent it from evolving.

Items

 * Persim Berry (hidden in mid-southeast corner under PokeCenter)
 * Cheri Berry (hidden a few spaces to the left behind Picnicker Heidi near the PokeCenter)
 * Nanab Berry (hidden in northeastern corner after coming out of Rock Tunnels southern entrance)
 * Super Potion (hidden just west of the pokecenter, accessible by using cut on a tree)