Baragon

Baragon (バラゴン Baragon) is a monster (or kaiju) that first appeared in the 1965 monster film Frankenstein vs the giant devil fish.

Frankenstein Conquers the World (1965)
Baragon appears as a prehistoric rampaging destroying tunnel monster that moves around japan destroying billdings and farms. befor battling Frankenstein in the lost ending he escapes and appears again in destroy all monsters.

Destroy all monsters (1968)
in this film Baragon is a monster that is being controlled by aliens.

Legendary Giant Beast Wolfman vs. Baragon (1972)
in this film Baragon appears i a burning industrial site (with Legendary Giant Beast Wolfman). The two kaiju recognize each other and soon start fighting. The two charge against each other, but Baragon throws Legendary Giant Beast Wolfman to the ground. As he gets up and resumes, the footage turns black and we are shown images of Wolfman fighting with Baragon and grabbing his tail.

Gmk Giant Monsters All Out Attack (2001)
TBA

Godzilla: Final wars
Baragon appeared as Stock Footage cameo from Frankenstein Conquers the World and Destroy all monsters.

Appearance
Baragon is a quadrupedal, mammal-like reptilian creature with reddish-brown skin, a single large horn on his forehead which is followed by several backwardly-curved spikes on the back of his head, and large, floppy ears. Baragon typically has facial features that look fairly similar to those of a bulldog or pug, with large, expressive eyes and a short muzzle. Baragon also has two sets of segmented, plate-like structures on his back and tail.

in Wolfman vs. Baragon Baragon looks like he did originally but with a smother back.