Beat

Beat is the robotic bird companion of Mega Man next to Rush. He was built by Dr. Cossack for Mega Man as a gift for saving his daughter Kalinka (though it was actually Proto Man who saved her). He serves a support role by either attacking enemies or protecting Mega Man, depending on the game.

Character description
Beat first appeared in Mega Man 5 where he attacks enemies that appear in Mega Man's path including bosses, but in order to obtain Beat, the player must collect 8 plates that spell the game's name (thus, the plates are M, E, G, A, M, A, N, and 5) distributed all long the eight Robot Masters' stages. Beat reprise exactly the same role of attacking enemies in Mega Man 6. This time, however, he could no longer attack bosses. Once again, plates were required to obtain him, with the difference this time only 4 plates were necessary (they spell his name: B, E, A and T).

Beat's most notable change came in Mega Man 7. After the player rescues him in a hidden area in Slash Man's stage using the weapon Scorch Wheel, Beat will appear whenever Mega Man falls into a pit and pull him for a while, but only if he previously had an item known as "Beat's Whistle". The player, then, must move to a safe area before Beat releases Mega Man, as he cannot hold his weight for much time. Beat did the same thing in Mega Man 9 and Mega Man 10, though the item required to use him was renamed "Beat Call".

In the Super Smash Flash series
uses Beat Call in Super Smash Flash 2 as his up special move. With this, Mega Man pulls out Beat, giving him about three seconds' worth of flight, not so different as he did in the  games. There is a notable difference from the Mega Man games and SSF2; this move can be used in conjunction with uncharged Mega Buster shots while in the Mega Man games, one cannot attack at all.