Pokémon Omega Ruby and Alpha Sapphire/Route 101

'After being given your first Pokémon, your next job is to find Birch's child, Brendan or May. They're not too far away, in Route 103, just north of Oldale Town.'

Route 101
First, you must traverse Route 101, a pleasant little lane linking directly to Oldale Town. There's no Trainers here and the wild Pokémon here are all weak. You can't catch any yet, but it's still a good idea to defeat a couple and level up your starter to give you more of an advantage against your rival in the upcoming battle. Note that when you can catch Pokémon, all Pokémon in this route have a guaranteed catch rate.