Invincible (status)

Invincible is a recurring status effect in the series.

Final Fantasy VIII
Invincible causes the inflicted character to be immune to all physical and magic attacks. It is caused by items such as Hero and Holy War or the Limit Break Invincible Moon.

Final Fantasy Crystal Chronicles
Invincible can be casted on a character during the final battle. During this battle, a Magicite will appear called ???. Using them can cast random magic, one of them being the ability to make a character immune to all attacks.

Final Fantasy Crystal Chronicles: Ring of Fates
Invincible status can only be inflicted on a character during Missions. During missions, random boxes with question marks will appear to give the characters random positive status like Haste, High Jump, and Invincible.