>>47274291A SE aerial ace that hits 3 mediocre types (in gen 3) hard. Depending on your set, the added coverage from flamethrower, fire blast, or even rock slide makes the move pointless. EQ already hits nearly all fighting types hard and Heracross is a PvP mon. You're better off spamming double edge/fire blast/EQ/rock slide offline unless your mence is CB in which case you might as well hack it for HP flying anyway. On DD sets, fly outclasses aerial ace as the two turn downside is irrelevant and also gives you free leftovers recovery. Compared to double edge, aerial ace is worse for every other type except ghost.
The super effective coverage is not worth considering on a move that weak.