Rush

Rush is Mega Man's red robotic dog in the Mega Man series. When Mega Man defeats a boss, he gets a Rush upgrade

Mega Man 1
Rush made his first appearance in Mega Man. There are only five Rush upgrades.

Mega Man 2
Same as the first game, except there are eight bosses and there are five Rush upgrades.

Usage
When Mega Man equips the Rush upgrade, the meter will be red. If the upgrade goes to 0, Mega Man must use another one.

Other Media
Rush appeared in every episode in Ruby Spears' Mega Man.

Rush is orange in Captain N. He only appeared in A Tale of Two Dogs.