Zilla, originally known as Godzilla, is a film monster originating from TriStar Pictures's Godzilla. It was initially created as a reimagining of Toho's Godzilla but was later re-branded as a separate character.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...