The battle factory is more dedicated to research than the other facilities, and the subject of the scientists' research is the abilities of Trainers when using rental Pokémon in battle. Before the player begins a battle, they will be told some information about the opponent's team, and may switch one of the Pokémon they have with them with one of the Pokémon used by the Trainer they just defeated. This is just like the Battle Tent in Slateport City.
At the 21st and 42nd battle in a streak, three and six times through the Battle Factory, Factory Head Noland will challenge the player to a battle. Like all other Trainers in the facility, including the player, his Pokémon are completely random, and so cannot be known until he is encountered. If he is defeated, he awards the Knowledge Symbol.
Both teams and your pokemon can be either lvl 50 or 100
Silver
Random
Gold
Random