One of the extra features that'll appear in this PS remake. Players can setup their own rules and choose which stage they wish to battle in. Traps can be enabled too.

Once all the preparation has been completed, each side becomes either the blue or red team and then it's time to fight. Battle rules are simple and are won when either side is completely wiped out or, if the timer (probably number of turns) runs out first.

After the battle, both the winner and the loser will have a chance to open up chests. How many you can open will depend on your win and lose stats.

Source:
• Famitsu

Related Links:
• Official Site
• Final Fantasy Tactics: The Lion War, Release Date Set
• Final Fantasy Tactics: The Lion War, PSP Remake in the Works