I basically set up all my pokemons to lv50 because I wanted to test something. Then I checked Tiers -> ORAS -> Side Metagames -> 3vs3 Singles. However, I was unable to find out a way to match with lv50 3vs3 single. All the battles come up with an opponent with lv100 6vs6. Is there a way to match one?
One of the rules of 3v3 Singles is that it is set a level 100, so you cannot do level 50 3v3 Singles. You may be able to try Random Battle though as it also has the bring 6 pick 3 format and is at level 50.