Aerilate will be legal for Round 1 only, as it was legal for the majority of sign-ups.
Round 2 and on, it will be illegal.
Also, you'll have to use the Custom Game format. Hackmons and Balanced Hackmons don't have Team Preview, so they can't be used, while AAA has Aerilate banned, which is of course not the case for this round. Round 2 and on, you can use the AAA format.
Note that anyone who is caught cheating with moves that the Pokemon doesn't normally learn, abilities that are banned in the format, or illegal EV spreads will be disqualified from the tournament, and further action may be taken.
On that note, won vs. Jacob
http://replay.pokemonshowdown.com/customgame-130795602