Greta

First appearance: Gremlins 2: A New Batch (1990)

The sequel to Gremlins. Billy and Kate have problems with Gremlins in New York city this time!

Gizmo

First appearance: Gremlins (1984)

Since I've already talked about Gremlins once on the blog, this is the Gizmo who's in Gremlins 2: The New Batch (1990).
Billy and Kate have moved to New York to put the horror of the Christmas of 1984 behind them, but when the scientists at Splice of Life discover Gizmo the Mogwai in the alley behind a closed shop in China town can mayhem be far behind?
Surreal sequel to the classic christmas movie.