Is there a Battle Institute in ORAS?

Question

I need to know so I can get BP besides the battle maison

Answer 1

What you're looking for is a battle test, right? In Mauville City's east row of shops, there is a place you can go to do Battle Tests.

Source: Experience

Answer 2

>In Pokémon Omega Ruby and Alpha Sapphire, it is located on the west side of the eastern mall of Mauville City.

There you have it, it is located on the west side of the eastern mall of Mauville City.

Source