Blue Falcon

Blue Falcon is one of the bosses in Shadow the Hedgehog. It is a giant mech that is in the same model series as Heavy Dog. It is used by a G.U.N. soldier in an attempt to stop Shadow and Black Doom's Eye from reaching the Eclipse Cannon aboard the space colony ARK. It wields an area-of-effect particle beam cannon and several rocket launchers on its side which can be broken off and used against it. It also appears as a Card in Sonic Rivals 2.

Trivia
It can be assumed that this boss' name is a referance to Nintendo's F-Zero series, where the main characeter, Captain Falcon, races a machine known as the Blue Falcon. The same thing can be said for Black Bull, which is also the name of the machine the main antagonist of the F-Zero series races. As SEGA helped develop F-Zero GX, this is not entirely unlikely.