It features a standard 3-vs-3 single or 4-vs-4 Double Battle format, with straight runs of 7 Trainers that get progressively more powerful as the player goes on.
At the 35th and 70th battle, five and ten runs through, respectively, Salon Maiden Anabel, the Frontier Brain, appears. If she is defeated, she awards the Ability Symbol.
The team lvl depends on your highest lvl pokemon
Silver Team
Alakazam
Ice punch
Fire punch
Thunder punch
Disable
Entei
Fire blast
Calm mind
Return
Roar
Snorlax
Body slam
Belly drum
Yawn
Shadow ball
Gold team
Raikou
Thunderbolt
Calm mind
Reflect
Rest
Latios
Psychic
Dragon claw
Calm mind
Recover
Snorlax
Curse
Return
Rest
Shadow ball