How do you defeat shademan?

I think you mean shademan SP. He wouldn't be so tough if there was no mystery data. Here is a folder you can use:
Woodpowder W x4
Invis* x4
Supervulcan V x1
Gunsol 1 G x1
Gunsol 2 G x1
Gunsol 3 G x1
Gunsol EX G x1
Bassanly X x1
Recover 300 J x3
Areagrab * x3
Popup * x2
Attack+30 * x1
Laserman X x1
Videoman V x1
Sword S x1
Wideblade S x1
Longblade S x1
Timpani * x2

That folder should really help. You should use Woodsoul's Tornado attack at shademan whenever he is about to attack. Use woodpowder in your own area and use an areagrab so you can hit him anywhere. DO NOT attack if he is in the same row with the mystery data or it could get destroyed. Use invis ONLY before using Supervulcan and Gunsol EX or if you really need it. Use Piledriver on shademan ONLY after he turns into bats or else it won't do a thing to him. You will understand
where to attack him when he turns into bats by looking at the shadow.Hope I helped!

Be specific, the first time shoot him until the battle ends. The second time
Destroy him with a dark chip. The times you find him on the net when you hit
Him and he turns into bats, shoot the bats.

Combine the fighting strategy with the Program Advance for GUN DEL SOL and fry him to death!
The rest lies on your skills otherwise beating him it's impossible! He MUST be in the middle so you fry him with sunlight from front and back row. That PROGRAM ADVANCE was made specially to
Beat shademan as it is useless with
Normal viruses, but it is extremely powerful against shademan.

Combine the fighting strategy with the Program Advance for GUN DEL SOL and fry him to death!
The rest lies on your skills otherwise beating him it's impossible! He MUST be in the middle so you fry him with sunlight from front and back row. That PROGRAM ADVANCE was made specially to
Beat shademan as it is useless with
Normal viruses, but it is extremely powerful against shademan