American Robot

"...Just remember that you and I are made from the same stuff: taxpayer dollars, American pride and the sweat of an honest day's work."

—Big Guy, Big Guy and Rusty The Boy Robot

Welcome to Eagle Land, USA bitches! We're rich, industrious, militarily powerful and burningly patriotic! How to show that in fiction? Why with Giant Robots of course. An America Robot, in short, is any super fighting machine that hams up the America to the power of eleven. Expect them to be decked out in the stars and stripes and packing the heavy artillery (as well as having a burning American pride).

Examples of American Robot include:

Anime and Manga

Heroman. "AMERICA BANZAI!" Aside, Heroman's giant red white and blue motif, complete with the hot-blooded IN AMERICA style (with a Phenotype Stereotype controller) is this trope to a T.
G Gundam has Chibodee Crockett's mech Gundam Maxter, which is a surfing Cowboy American Football-player Giant Robot boxer. Most countries have equally stereotypical gundams, but they usually don't have quite that many different stereotypes combined. Also, his crew is a bunch of Wrench Wenches.
Getter Robo: Texas Mack, the revolver-toting, lasso-throwing giant robot cowboy guardian of the USA, piloted by an Engrish-spouting cowboy and his sister. Also has its own giant robot horse, piloted by Jack King's ranch dog.
- The American robots in the manga tend to be pretty normal looking, at least until Hien where the Statue of Liberty itself is a giant cannon/jet piloted by a Humongous Mecha.

The Big Guy, of The Big Guy and Rusty the Boy Robot, which is Justified Trope, as the whole program was an over glorified publicity stunt. He's partnered with an Expy of Astro Boy though.
Atomic Robo reeks of the trope, especially with his classical 20th century American values.
DC Comics' G.I. Robot (aka J.A.K.E.)
S.T.R.I.P.E. from the Stars And STRIPE comic in The DCU.
Dark Reign Iron Patriot is a smaller-scale example of this, mimicking both Iron Man and Captain America (comics). He happens to be the Green Goblin under a new name, but you can't have everything...
- Marvel also made Detroit Steel shortly afterward. Subverted in that he changes design to suit his current employer, at one point becoming a Japanese Robot.

Short Circuit Johnny Five, as of the epilogue of the second movie.
Subverted in Iron Man 2: Hammer tries to pass off the Hammer-roids as this. They come in Army, Navy, Air Force and Marine models no less. Every model has a specialist weapon or device attached to it - an anti-armor cannon for the Army, missile launchers for the Navy, high-speed flight systems for the Air Force, and close-range machine guns for the Marines.

The title Metal Wolf of Metal Wolf Chaos. Its alt forms are even more patriotic.
Fallout: Liberty Prime might not be flag-themed, but he IS a giant robot that spews pro-American, anti-communist propaganda while throwing nukes like they were footballs.
- Playing "America Fuck Yeah" while Liberty Prime is marching down the street is quite entertaining. The song can be found here (somewhat NSFW): http://www.youtube.com/watch?v=sWS-Fo Xbj VI
  - Ladies and gentlemen, your wishes have been granted.

Code Guardian, an an awesome web-original video production of a giant American Robot defeating a giant Japanese Samurai Robot and a Giant Nazi Robot in an Alternate(mech-based) Pearl Harbor.

In Sinfest, being the president of the United States apparently involves piloting one of these.

A robot introduced in the last few episodes of Sym-Bionic Titan was the Homeland Mobile Emergency Robot or HMER (pronounced hammer). Commanded by General Steel. Commanded, not piloted, because it has a large a crew as a battleship. Not patriotically colored, instead it goes for a traditional army green. It also is more of a Real Robot than a Super Robot, it is very slow and resource intensive. There are multiple shots of all of the tank shells it expends when it fires its machine guns.
Big Guy and Rusty The Boy Robot: the BGY-11 in this version is just really patriotic because it's his job to defend the country, rather than as a publicity stunt. He's also not really a robot.