Thunder Of Gigantic Serpent (1988, Godfrey Ho)
How I love this man. Let me thee the ways ....
Scientists make a big frog. Bad guys try and steal said amphibian. When this escapee crosses paths with a child's pet, all hell breaks etc.
Fun AF this one. The usual tin ear for dialogue and unofficial ST are in place. The villians all wear slacks

which makes them look like they're off golfing next

The finale. Wow. Unparalleled HO madness. A hoot. It's on YT. ENJOY!!!