Item-1

Item-1 (アイテム１号) is one of the three transport items from Mega Man 2. It is a levitating platform that Dr. Light created to assist Mega Man, finishing and giving it to him after Heat Man is defeated. It is possible to have three platforms on screen at once. Each platform consumes 2 units of energy.

Item-1 is required to reach a ladder in the first Wily Castle stage, and can be used to bypass some walls in Boobeam Trap's room, saving Crash Bomber energy. During the fight with Air Man, if Mega Man stands on an Item-1 platform, Air Man will not blow his tornadoes.

Item-1 is also available in the Wily Tower mode from Mega Man: The Wily Wars.

Archie Comics
In the Archie Comics Mega Man series, Dr. Light supplied Mega Man, via Cut Man, with program data that allowed Mega Man to utilize Item-1s, alongside Item-2s and Item-3, after Mega Man had been restored to his regular state of mind, but only Item-2 is used by him.

Rockman: Dr. Wily no Inbou
After Heat Man's defeat, Dr. Light appears and equips Item-1 on Mega Man while explaining how it works and what will be his next object. Mega Man later used Item-1 in Wily's fortress to reach a ladder, to temporarily avoid the Metalls from Guts Tank, and in Boobeam Trap's room.

Mega Man Megamix
While not seen in the manga, Item-2's description notes that Item-1 and Item-3 also exist, but Item-2 was best suited for the urgent nature of Mega Man's situation.

Other appearances
Item-2 appeared in Rockman 4Koma Dai Koushin.