Megaman Battle Network 4: In Battle Green Mystery Data

Upon entering a battle on the network, there is a chance you'll see a Green Mystery Data on a tile. If it stays intact until the end of the battle, it will give the player an additional reward at the end of the battle. Small computer areas and dungeons can never have battles with a GMD in it.

The GMD can only appear in certain encounter formations, and even then it's not guaranteed to spawn in said formation. The contents of the GMD are predetermined once the battle starts, no actions can change what it awards at the end of the battle. The contents of the GMDs will also never change on subsequent playthroughs. The only GMDs that has version exclusive awards are the ShadeMan Omega and LaserMan Omega fights. All other GMDs have the same rewards across both versions. The GMD contents vary on the larger areas, not the individual screens (i.e. ACDC Areas 1 and 3 pull from the same pool). ShadeMan Omega and LaserMan Omega are the only exceptions to this rule.

The encounter formations can be found here: https://www.therockmanexezone.com/wiki/Category:Areas_in_MMBN4

ACDC Area:
	2000z			3/8	37.5%
	BugFrag 1		3/8	37.5%
	DublCrak *		2/8	25%

Town Area:
	BugFrag 1		4/8	50%
	Cannon *		1/8	12.5%
	TimeBomb1 L		1/8	12.5%
	Tornado T		1/8	12.5%
	Ball V			1/8	12.5%

Park Area:
	BugFrag 2		4/8	50%
	Spreader *		1/8	12.5%
	Ball B			1/8	12.5%
	Magnum H		1/8	12.5%
	PopUp P			1/8	12.5%

NetFrica Area, Neotopia Area, Sharo Area, and YumLand Area:
	BugFrag 2		4/8	50%
	Static *		1/8	12.5%
	MetaGel Z		1/8	12.5%
	Magnum V		1/8	12.5%
	PopUp *			1/8	12.5%

Undernet:
	BugFrag 3		4/8	50%
	MetaGel T		1/8	12.5%
	Mine Z			1/8	12.5%
	VDoll Y			1/8	12.5%
	DrkLine *		1/8	12.5%

Black Earth:
	BugFrag 5		3/8	37.5%
	TimeBomb J		2/8	25%
	BugChain *		2/8	25%
	FstGauge *		1/8	12.5%

ShadMO/LasrMO
	BugCharge C		1/1	100% (Red Sun)
	BugCurse C 		1/1	100% (Blue Moon)

Unused:
	1000z			1/8	12.5%
	BugFrag 1		1/8	12.5%
	BugFrag 2		1/8	12.5%
	Cannon A		5/8	62.5%