Special Moves and Abilities
Defense Mastery is a Special Move.
- “Raises your physical resistance for a short time while lowering your ability to inflict damage.” 
Mobiles Using Defense Mastery
Mobiles which can train in Defense Mastery
This only lists mobiles which can train in Defense Mastery 'out of the box'. Some additional mobiles may also be able to train Defense Mastery if their initial set of abilities and moves is modified.