Well, basically you'll just have to spam through style changes. Once you can get style changes, go to ACDC (preferably 1) and just fight with your buster. It'll take a while, but eventually you'll get a guts style. It's just luck whether it's aqua or not. Rinse and repeat, and eventually you'll land an aquaguts. Though it'll take a Long time--that's right, capital L. You'll have your work cut out for you. You go do that. I'll just . . . take a nap . . . zzzzz . . .
In MegaMan Battle Network 3, you can obtain the Antidmg (Anti-Damage) Battle Chip from the folder of the character called "GutsMan." Specifically, you can find it in the "Aqua" folder after defeating the Aqua-based NetNavis. Additionally, you can also acquire it by trading with other players or through certain in-game events. Make sure your folder is well-organized to maximize your chances of drawing it during battles.
battle all team aqua
to battle them
aqua man is an modern toy version of poseiden or neptune
team aqua has a kyogre and team magma has a groudon first you go to team aqua base and battle kyogre and team then you go to team magma base and battle groudon
at there hide out
Team Aqua's leader is Archie. He will battle you on some occasions. One good example is a battle with him in Mt. Chimney and Mt. Pyre.
you find it in the team aqua hideout
you battle them
that singer is Corey maddox
take the meteorite
you have to find and beat team aqua when they awaken kyogre then you go to sootopolis and into the cave of origin to battle kyogre if you defeat him(or capture him) you can then go into the gym