NO - only Gym Leaders and the Stat trainers appear in the Battleground (your 'top trainer cafe').
it is supposedly lukes father as it is revealed in the platinum version he's a frontier brain. You Welcome
A sinnoh frontier brain named arcade star dahlia
either way works
dont cheat it ruins the game
you battle in different ways and once you battle one of the five places so many consecutive times you face a frontier brain who are the best at what they do.
They're very difficult to beat, you need to train your Pokémon a lot if you want to have a chance against them.
Each facility in the battle frontier has a frontier brain to challenge them beat each facility 3 times in a row the next time you get to the 7th trainer it will be the frontier brain.
I know that Darach uses: Empoleon Staraptor And I think a Houndoom, if I'm wrong then I'm sorry but I forgot the last one
beat a frontier brain 2 times
yes
In the new battle frontier system (for GEN 4 at least) You fight a frontier brain twice.If you beat them first time, you get a silver print.Second time, you get a gold print.-Hope this helps! =DD
No, but the Frontier Brain of Sinoh is there as an Elite Four member.