Gundalian Castle Knights

When Ren became emperor, he inprisoned the remaining 8 orders and thus, Berodius's former guards. He replaced them by the finest soldier in the gundalian army and called this group the castle knights.

After Shun was made into a gundalian servant, he banished the old castle guards and replaced them by Shun and clones of shun. This new elite group of brawlers have brawlers for every type of bakugan. They use the bakugan siege for their battling.