This ability is considered a physical attack; however, the damage is known to be influenced somewhat by the target's resistance or vulnerability to fire.
A glitch with this attack can sometimes prevent it from counting for certain Magian Trials. It is known not to count as a finishing blow with fire damage (It is considered a physical attack), and it sometimes does not count as a finishing blow with Ifrit.
After logging out and logging back in, Flaming Crush began to count as a kill with Ifrit.
Flaming Crush consists of 2 physical hit, and one elemental hit. This is evidenced by the fact that this move can only generate 2 hits worth of TP.