Rush

Rush is Mega Man's faithful robotic dog. Created by Dr. Light to assist Mega Man in his travels, he debuted in Mega Man 3. Initially, Rush was able to transform into a coil, a hoverboard, and a submarine. In Mega Man 6, he was upgraded and gained the ability to fuse with mega Man to form the Power and Jet Suits. In Mega Man 7, his jet and coil abilities returned, but he now had Rush Search, a detection mode. Also, both of his suit transformations combined into one: the Super Adapter. In Mega Man 8, he has more abilites than ever, including a transformation into a motorcycle and healing abilities.

Items
The ways Rush is used in the games.

Rush Coil
A coil appears in Rush's back to Mega Man reach high places.

Appearances: Mega Man 3, Mega Man 4, Mega Man 5, Mega Man 7, Mega Man II, Mega Man III, Mega Man IV.

Require: You start with it in all the games it appear. (maybe?)

Rush Jet
Rush turns into a jet to transport Mega Man. (It's like an upgrade of the Item 2 from Mega Man 2)

Appearances: Mega Man 3, Mega Man 4, Mega Man 5, Mega Man 7, Mega Man II, Mega Man III, Mega Man IV.

Rush also takes this form in Mega Man 8, but it can't be used as a item. It has also appeared in the Mega Man cartoon series.

Require: Defeat Needle Man (Mega Man 3)

Rush Marine
Rush turns into a submarine.

Appearances: Mega Man 3, Mega Man 4, Mega Man II, Mega Man III. It has also appeared in the cartoon series.

Require: Defeat Metal Man (Mega Man II)

Rush Power Adapter
Rush junctions with Mega Man. It is able to break blocks.

Appearances: Mega Man 6

Require:

Rush Jet Adapter
Rush junctions with Mega Man. It is able to fly.

Appearances: Mega Man 6, Mega Man 7

Require:

Rush Search
Rush will appear and dig for random items, but sometimes he only find garbage, like old shoes and cans. There are CDs that can only be taken with him, because they are buried. The item CD Finder helps to locate buried CDs. Auto: "Rush will dig out a hidden item for you. Believe me, he is a good Digger!"

Appearances: Mega Man 7, Mega Man and Bass

Require: ? (Mega Man 7) Buy it by 100 Screws (Mega Man and Bass)

Rush Charger
Rush throws random items from his back (like Eddie).

Appearances: Mega Man 8

Require:

Rush Cycle
Rush turns into a bike for transport.

Appearances: Mega Man 8

Require:

Rush Bomber
Rush takes his Rush Jet form and fly on the top of the screen throwing bombs.

Appearances: Mega Man 8

Require:

Rush Health
Rush takes his Rush Jet form and fly on the top of the screen throwing items.

Appearances: Mega Man 8

Require: