there is a giga chip called deltta ray....
you get it by battling with a white version of megaman network 3 or if u r a white version get it by battling someone from the blue version.

well i got another giga chip by defeating BassGS. To battle him u have to defeat sernade and feed the bug trader in secert area 3 300 bug frags. I should warn u about BassGS. He has a arua of 200 and HP of 2000. Mostly all his moves take 200 or more. the way i beat him is using north wind, then attacking, then use geddon 3. then use snctuary and life aura. I hope this helps. two more thing, one is use folderbak, second u have to get all 200 standard chips to fight sernade.