Pokémon FireRed and LeafGreen/Route 11

This route has a lot of grass and a small water area, plus there are 10 trainers that are ready to challenge you. In addition, the building that separates this area from route 12 contains Professor Oak's aide who will give you an Itemfinder as long as you have caught 30 different Pokemon in your Pokedex.

Trade
The building at the end of this path offers the opportunity to trade the first evolution of the version of nidoran common to your game, so if you skipped the chance to acquire on the route 5 underground path, you can do it here as well.

Items

 * Awakening
 * X Defend
 * Great Ball
 * Escape Rope (hidden in a rock in the northeast part of the route)
 * Item Finder (Given by Professor Oak's aide if your Pokedex contains at least 30 Pokemon)