How you can catch Bulbasaur omega ruby?

In Pokémon Omega Ruby, you can catch Bulbasaur by trading with someone who has it, as it is not available in the wild. You can also obtain it by participating in certain events or through the Pokémon Global Link if it is offered. Additionally, if you have Pokémon X, you can catch Bulbasaur there and then trade it to Omega Ruby.