The original Godzilla (or "Gojira," a portmanteau of the Japanese words for gorilla and whale) stood 50 meters tall and weighed 40 million pounds. Not that it stopped dumb-ass kaiju from messing with him. (Expand the gallery to fullscreen for the best experience.)

Hedorah (aka The Smog Monster)

First Appearance: Godzilla vs. Hedorah (1971)

Height: 60 meters

Weight: 96 million pounds

Powers: Discharges sludge; fires energy beams; merges with other Hedorahs, Voltron style

Megalon (at right, with Godzilla, GIgan, and Jet Jaguar)

First Appearance: Godzilla vs. Megalon (1973)

Height: 55 meters

Weight: 80 million pounds

Powers: Shoots napalm bombs from mouth, electric bolts from horn, and can fly and swim

Anguirus

First Appearance: Godzilla Raids Again (1955)

Length: 100 meters (60 meters standing upright)

Weight: 60 million pounds

Powers: Super-spiky and can jump like the dickens

Ebirah

First Appearance: Ebirah, Horror of the Deep (1966)

Height: 50 meters

Weight: 46 million pounds

Powers: Swimming, horrific claws

King Ghidorah

First Appearance: Ghidorah, the Three-Headed Monster (1964)

Height: 100 meters (150-meter wingspan)

Weight: 60 million pounds

Powers: Can travel through space; can surround self with a meteor

Gigan (At right, with Godzilla and Ghidorah)

First Appearance: Godzilla vs. Gigan (1971)

Height: 65 meters

Weight: 50 million pounds

Powers: Night vision, laser cannon in face, abdominal buzzsaw

Frankenstein

First Appearance: Frankenstein vs. Baragon (1965)

Height: 20 meters

Weight: 4 million pounds

Powers: Regenerates body parts, great at speed dating

Rodan

First Appearance: Rodan (1956)

Height: 50 meters (120-meter wingspan)

Weight: 30 million pounds

Powers: Wings generate hurricane winds, spiked chest

King Caesar

First Appearance: Godzilla vs. Mechagodzilla (1974)

Height: 50 meters

Weight: 60 million pounds

Powers: Eyes can reflect energy

Manda

First Appearance: Atragon (1963)

Length: 150 meters

Weight: 60 million pounds

Powers: Constricts enemies

Mechagodzilla

First Appearance: *Godzilla vs. Mechagodzilla * (1974)

Height: 50 meters

Weight: 80 million pounds

Powers: Shoots beams from eyes, missiles from most body parts, can fly at Mach 5

Mechani-Kong

First Appearance: King Kong Escapes (1967)

Height: 20 meters

Weight: 30 million pounds

Powers: Can shoot hypnosis beam from head

The Meganulon

First Appearance: Rodan (1954)

Height: 8 meters

Weight: 1 ton

Powers: Pincers, blue-collar work ethic

Moguera

First Appearance: The Mysterians (1957)

Height: 50 meters

Weight: 100 million pounds

Powers: Can shoot terrible VFX from its eyes

Mothra

First Appearance: Mothra (1961)

Length: 80 meters (250-meter wingspan)

Weight: 30 million pounds

Powers: Wings generate hurricane winds, can fly

Varan

First Appearance: Varan (1958)

Height: 50 meters

Weight: 30 million pounds

Powers: Gliding super-fast. (Yaaaay.)