Defense helps determine how much damage a vivosaur takes from attacks. Vivosaurs with high Defense can withstand strong attacks, even if they have an elemental weakness. The Defense stat of a vivosaur in Champions can be raised by integrating Miraculous Fossils, as well as Wondrous Body and Leg Fossils.
Defense can be raised with support effects as well as the skills Harden and Super Harden. Powerful defense can be bypassed with Poison, as it ignores Defense and inflicts damage based on the target's max LP.