Pokémon Omega Ruby and Alpha Sapphire/Route 102

A pleasant, grassy route linking Oldale Town with Petalburg City, it's time to test your skills as a Trainer.

Route 102
Upon returning to Oldale Town, you'll find that the scientist has discovered that the footprints he was sketching so earnestly turned out to be his own footprints. He sheepishly stands aside, and you can now enter Route 102.

Route 102 contains your first ordinary Trainers. If you're not sure if you're ready to take them on, there's a patch of grass to the left of the pond that contains the Route's Pokémon where you can train and expand your team. The highest level Pokémon of the Trainers is 5, with most being 4, so your starter should easily be able to take care of them, but it's never too early to start building a team; consistently relying on one Pokémon is a bad habit to get into. Only one Trainer, the first Youngster in the route, cannot be avoided, but it really is best to fight every Trainer you meet (unless your Pokémon are unfit for battle, in which case it's better to return to Oldale and recover) to pick up high EXP and money. If you're trying to avoid Trainers, keep in mind that running will attract their attention.

At the top of the route, next to Youngster Allen, are two Berry trees: an Oran tree and a Pecha tree. Berries are items that can be held and used by Pokémon in battle or otherwise used to make Pokéblocks for improving your Pokémon's Contest stats. Oran Berries in particular are useful at this stage of the game because your Pokémon will use them to restore 10 HP if its health falls below 50%. You can replant some if you like, but it's better to wait until you get the Wailmer Pail, as that will improve your yield.

To the south of the Lass, in the final patch of grass, there is a Potion. After that, simply walk out towards Petalburg City.