Megaman Battle Network 2 is the direct sequel to Megaman Battle Network. It was released June 17, 2002, for the Game Boy Advance.

MMBN2 takes place 3 months after the end of MMBN, after the downfall of WWW and their leader, Dr. Wily. Peace is had for awhile, until an increase in Netcrime starts, all thanks to a NetMafia organization known as Gospel. Once again, it's up to Lan Hikari and his Navi Megaman to end Gospel's plot to destroy society.

MMBN2 plays like MMBN, recycling most graphics from the previous game, but with certain game changes. The armor system was removed, now replaced with a "style" system, Megaman doesn't autoheal after every battle, and Subchips (chips that can be used outside of battle) have been added to balance that. Only a maximum of 10 chips will be available in battle, and an extra 100+ chips have been added (with some original ones removed or having their name changed). Battles are the same. Gameplay is the same. The core "search the towns/search the net" style remains.