Resistance is a gameplay mechanic in the games of the Baten Kaitos series. In both, resistance dictates a party member or enemy's ability to avoid suffering a Status Ailment during Battle.
In Baten Kaitos: Eternal Wings and the Lost Ocean resistance is gained primarily by the use of Equipment Magnus outside of battle and Battle Magnus within.
In Baten Kaitos Origins possessing certain Quest Magnus will boosts or lower the party's resistance. Use of equipment and items in battle can also effect both the party and enemy's resistance.