Before getting into this, beat Serenade, otherwise it's pointless. Having done that, merely jack out and back in and there will be purple navis all over the place (the Secret Area) asking you to do stuff. Like kill navis with extra folders in short periods of time.
Only in Blue, and a reward for successfully completing the Serenade Time Trials. These will be available after you defeat Serenade.
you can't. Dark aura can only be gotten in megaman battle network 3 BLUE. You get it by doing all the time trials in secret net. In WHITE, you get the Serenade chip.
You have to delete them in ONE hit (No Roll or Yoyo, for example) and delete all of the No. 1s at the same time. (Try using Muramasa if you have it, and Copydamage.)
Serenade is in Secret Area 3, at the top of the steps behind the "door of honor." You'll need all 200 standard chips to open it and fight him. And you have to have beaten the game. That helps too.
You need to level up the Bug Style. To get the Bug Style, you have to have a bug in the NaviCust thing. It takes a very long time to level up, though.
In MegaMan Battle Network 5: Team Colonel, to get all Battle Chips, you can use a cheat code by entering the following: while in the game, press L + R + Start + Select at the same time. This will unlock all Battle Chips in your library, allowing you to access any chip available in the game. However, using cheats can affect your gaming experience and achievements, so use them wisely!
In Megaman Battlenetwork 3 Blue ONLY DarkAura A is available as a reward for completing the Serenade Time Trials. DarkAura is not available in White without cheating. The Time Trials consist of the alpha versions of all previous Navis (excluding Punk, Serenade, and Bass, while Alpha isn't a Navi) which must be defeated in a given time limit with an extra folder. They are available in the Secret Area after defeating BassGS.
I go to netbattle gutsman v3 in wily's fortress(once you get that far). Gutsman is easy to beat, and you get 5 bugfrags for each counter strike against him: not hard, just time-consuming.
hero faces many trials
You have to search around literally everywhere; on the net (talk to random navis), in signs, bushes, etc. Just go around and search and eventually you'll get 50. I found 51 or 52 points 1 time when i was searching really hard on hard and very hard difficulty.
At this time Megaman is 25 years old however on December 17th he will be 26.
A variety of ways. Navirecycle is obtained for 200 bugfrags from the bugfrag trader in Undernet 2, accessed through the gargoyle on HadesIsle. Bass is obtained by beating BassGS. Serenade is obtained by completing the Time Trials. Balance is obtained by random battles in VS. mode. All the V5 navi chips are available after beating the V5 navis. AlphaArm Sigma is available from Alpha Omega. Giga chips exclusive to Blue will remain so unless you cheat.