Zilla

Zilla is a mutated iguana which appears in TriStar’s Godzilla which released around may 1998 in the US.

Godzilla (1998)
A company tested on iguanas.but the company gets attacked by zilla.zilla destroyed several American boats as he walked towards the city. When the movie gets close to the end. Zilla Chase's the heroes to the Brooklyn bridge whtitch he gets Tangled in the wires.. that was the last time we saw him...except for Godzilla the series.

Godzilla: Final Wars
Zilla is being controlled by the Xilians and under their control he attacks Sydney, Australia. He topples down buildings, chomps on vehicles, incinerates crowds, and even eats several citizens. Zilla, along with the other monsters, are then teleported away by the Xliens. The Xliens then tell Earth they took the monsters away to save them.

Eventually the humans figure out the Xliens were behind the attack, and the aliens then bring the monsters back, where they wreack havoc again. However, Godzilla is freed from the south pole and arrives in Sydney to face Zilla. Zilla is then summoned to battle Godzilla in a fight memorable for the ages. Zilla then charges at Godzilla as the Big G fires his atomic breath at the marine doppelganger. Zilla jumps into the air, only to get hit by Godzilla's tail and knocked into the Sydney Opera House. He is too slow to react when Godzilla fires his atomic rays, killing him.