Ho Hum... Never really used heracross...
Choicebandcross
Item: Choice Band
Nature: Adamant
Ability: Moxie
Moves:
Mega Horn
Close Combat
Stone Edge
Aerial Ace/Return
Ok, so we like moxie because it gives us and attack boost, which on top of Choice Band is... Boss like...
Mega Horn is the most powerfull bug type move, buuut has shaky accuracy. It's also the only plus 60 power bug type move that heracross can learn...
Close Combat is one of the most powerfull fight type moves, certainly the most risky that he can learn.
Stone Edge Is to deal with flying types and fire types.
Aerial ace is to deal with... fight types? But you could choose return to just get neuteral damage on most

EV's 252 Atk, 252 spd, 4 Hp.
Reversal-sub-punch
Item: leichi berry
Nature: Adamant
Ability: Moxie
Moves:
Substitute
Reversal
Focus Punch
Mega Horn
ok, this is a fusion of the low Hp, use reversal thang and the sub punch game.
Substitute to bring you down to low health and maximise Reversal
Reversal for when you have low Hp...
Focus Punch for using the wasted subs...
Mega horn because it prowns.
EV's 252 Hp, 128 spd, 128 atk.