How do you defet punk in Megaman battle network 3 blue

It's hard, ain't it? A good strategy is to open up the field using chips like Geddon 1 and 2, which will prevent him from attacking, or using a rockcube or similar object to do essentially the same thing. Then, just attack him. Try not to use swords, as getting close enough to use swords on him is dangerous. Just attack with whatever you've got, which will hopefully be program advances such as hyperburst, heatspread, bubblespread, and others.