When NetNavis are defeated in these battles, they are usually logged out to avoid permanent damage, though if they're not logged out fast enough, or if they suffer a fatal blow, they will get deleted. For example, MegaMan was deleted after getting hit by PharaohMan's piercing laser in MegaMan NT Warrior and when he overloaded to Jack Out Lan's conciousness from within Alpha in Mega Man Battle Network 3 , eventually getting left behind to be absorbed by the beast and remain outside his PET till returned after the events of the game.