In addition to Energy Tanks, Mega Man 2 featured special transport items designed to combat player complaints regarding the original game’s difficulty. These items were always intended to be given proper names, but the development team ran out of time and the items were replaced by Mega Man’s robotic dog, Rush, from Mega Man 3 onward.
Item-1 is a floating platform obtained after you defeat Heat Man. Item-2 is a jet platform obtained by defeating Air Man. Item-3 is a platform that crawls up walls and is obtained after defeating Flash Man.