Here's a tip for the Navi cust if you're trying to get Bug Sytle for Bug Stop
Upper Left Coner:
Weaplv+1 Speed +1 Fastgauge on the right
Next line:
Speed +1 Collect Speed +1
Next line:
Undersht
Next line:
Charge +1
Bottom:
Weaplv+1

When you run the Navi Cust, press Select. Then eneter this code:
GJHURIE (and the 2nd symbol)
Then BINGO! 350 HP on the spot! This code will work with any combination that doesn't require a code! Must have Modcode to work.

With the Fastgauge on the right, you will get a Slowgauge effect, so carry a Fstgauge * and set it so it shows up every time and use it right away. Collect is there because you should walk around areas with weak viruses like ACDC. Around ACDC, carry or set Gutsman V2 or 3 because he can kill alomost all the viruses that show up with 1 hit!! That will level you up faster. Collect will give you chips every battle so there's extra chips for the Chip Trader! So you're killing 2 birds with on stone! You can try to get the Bug Sytle and fill your Libaray at the same time!! I did this and got my star in no time! Also, if you time it just right, you can get a lot of Bug Frags! Just carry Cannons and Air shots.
Okay, here are some chips I like to use:
M-Cannon P Q R
Air Shot *
Sword L
Widesword L
Longsword L
Fireswrd N
Aquaswrd N
Elecswrd N
Bambswrd N
Stepswrd P
Stepcros R
Recov120 *
Recov200 N
Recov300 O
Snctuary A
Antidmg M
Atk+10 * & *
Navi+20 * & *
Heroswrd P
Zeushamr Z
Roll V3 R
Gutsman V5 G
Protoman V4 B
Flamman V3 F
Drillmn V4 D
Plantmn V3
Folderbak * (Blue Only)  / Navirecycle * (White Only)

For fighting Bass & Alpha use:
Fireswrd N
Aquaswrd N
Elecswrd N
Bambswrd N
Stepswrd P
Stepcros R
Mine *
Totem 3 Q
Drillmn (Whichever version you have. Works well with Bass if hits more than once)
Recov300 R
FstGauge *
Crsshld 3 N (2 or 3)
Nrthwind A & N
Muramasa M
Roll V3 R (I know it doesn't do damage if Bass's Aura is up, but it's a chance plus Roll heals you)
Flashmn V3 (If you hit Bass with this after Nrthwind, it'll freeze Bass for a few seconds so you can hammer him!)
Plantmn (Any version same thing as Flashmn)
Protomn V4 (Probably won't have this unless you trade but use it on Bass V2!)
Snctuary A
Antidmg M
Atk+10 * & *
Navi+20 * & *
Heroswrd P
Zeushamr Z
Folderbak * (Life saver with Alpha if you use Muramasa twice!) / Navirecycle *