I'm pretty sure you couldn't in-game so I don't think you can in ASB. The only things that can change the damage from a self-hit iirc are rank difference (own attack vs own defence) and any stat boosts to those two stats. Oh, and any abilities that nullify self-hit damage or the confusion status.
<dogfish44> I got a suprise KFC ^.^
<Glacier> kinky fat chick?