How do I unlock rank 4 parts for the Burning Gundam?
Unlock and clear the “King of Hearts’ Challenge” Extra Mission. To unlock the mission, you must clear all three “Gundam Fight” Friendship Missions (which are unlocked if your character has cleared 15 or more missions and has a relationship level of “Caution” or below with 8 or more characters), read the terminal message you receive after clearing the “Gundam Fight: Finals” Friendship Mission, and shoot down 3000 or more enemy units while piloting the Burning Gundam (combined total for all pilots).
