Mega Man Battle Network 3 Blue

Look at the styles FAQ--just have a lot of virus battles (100 at most) and you'll upgrade or switch.

Fight fight fight! You can do ti!

Find someplace like the doghouse and fight viruses for a long time.
Or if you have gotten Chaud into Hades fight him until you get ten ProtoMan chips. Now go use the studio 10-trader and fight a virus. For some reason that will always trigger a style change/level up.

If u want bug style u can program megaman to make him have a glitch and just fight wth that glitch untill u get to change styles and u get bug style megaman.

In Order to obtain cetain styles, you must level up current style only once. Then, you will have the option to rather keep leveling up current style or choose new one. Then level up this style once to keep or find a different one. Ex: I maxed WoodGuts and ended up with ElecTeam style. I'm currently trying to max out all styles

To obtain more styles, you have to fight a certain way when you want to switch in order for them to change. However, you can only have 2 styles at a time: Normal Style and the last acquired style change. See www.gamefaqs.com/portable/gbadvance/file/915457/21884 for more info on how to obtain these styles (although it hasn't told me how to get the Ground style yet).