Hoenn Route 101/Games/Route description

Route 101, the first route which Trainers from Littleroot Town traverse on, is home to a wide array of different Pokémon. Hence, Professor Birch often performs his studies here. Heading north from Littleroot, the route forms a "U", turning north and immediately backpedaling east near the first patch of grass. A ledge blocks the way north, letting only southbound travelers avoid the grass. Route 101 then turns north into another patch of grass as it heads west. At this point, the path travels through the last of three grass patches. Route 101 then turns north as it enters Oldale.

At the start of the game, the undefined meets Professor Birch as he is being attacked by a wild Pokémon. The player then battles the Pokémon with either a, , or , found in s in the Professor's bag. Whichever of the three Pokémon that is chosen will become the player's starter Pokémon.

In Pokémon Omega Ruby and Alpha Sapphire, after battling with Brendan/May on and returning to the lab, the player will receive the DexNav application at the entrance to Route 101. Near Oldale Town, Brendan/May will explain the mechanics of hidden Pokémon, then a hidden Poochyena will appear. If the player succeeds in sneaking up to the Pokémon, the encounter will be a level 5 Poochyena that has an elemental fang attack as its first move; if the player scares it away, enters another battle, or leaves the area, the Poochyena will not reappear.

In Pokémon Omega Ruby and Alpha Sapphire, Professor Birch will give the player more starter Pokémon from other regions if the player has completed certain milestones. The following starter Pokémon are available: If the above conditions are met, then the next time the player exits their house in Littleroot Town, Professor Birch will be heard yelling for help from Route 101. When the player arrives to help, they will be allowed to choose one of the starter Pokémon.
 * Johto starter Pokémon (,, and ): after entering the Hall of Fame for the first time and meeting Zinnia
 * Unova starter Pokémon (,, and ): after completing the Delta Episode (and after choosing a Johto starter)
 * Sinnoh starter Pokémon (,, and ): after entering the Hall of Fame for the second time (and after choosing an Unova starter)