Mecha

Mecha are typically GIANT ROBOTS normally operated by bags of flesh. Thought to have originated in Greek myth with Talos and whatever... But really, it's the Japanese that revitalized the concept. They needed something to fight off Godzilla.

They come in two types: Real and Super. Where "real" involves mechs which are "realistic" in operation (see Battletech, Mechwarrior) and "super" where you throw reality out the window (anything that disregards reality and common sense).

Usually seen in the following sizes:

• Power Armour. This fits over the body of the pilot. Size dependant on the species of whoever's wearing it.
• Small. About the size of a car or SUV. Appleseed presents these nicely.
• Medium. About the size of a tank or jet fighter. See generic Gundam or Macross mechs.
• Large. Size of a 20 story building. Think Eva Units from Neon Genesis Evangelion.
• Huge. There isn't really any comparison here... A mountain, perhaps? Titans fit the bill nicely.
• XBOX HUEG. Anything larger than huge would go here. From moon-sized to the size where you can toss planets and and even galaxies with ease.

Then there are various sub-types:

• Mechanized. Typical giant robot made from metal.
• Flesh. They are usually called "bio mecha" and are made of fleshy bits. See Eureka 7, Escaflowne and Neon Genesis Evangelion.
• Will powered. Mechs powered by raw manliness or other squishy emotion. Tenga Toppa Gurren Lagann fits the bill perfectly.
• Combiners. These mechs are composed of various other mechs. See Power Rangers.
• Transformers. Mechs that have two or more forms they can switch between. See Macross and (durr) Transformers for examples.