Muzzy Comes Back

Muzzy Comes Back (also known as Muzzy 2) is a sequel to the animated TV film "Muzzy in Gondoland", created by the BBC in 1989 as a way of teaching English as a second language.
Plot.
Muzzy, the friendly green clock-eating monster from outer space, returns for more adventures with his friends in Gondoland. Everyone expects him, and King Nigel and Queen Elza decide to arrange a ball for the christening of Bob and Sylvia's new baby daughter Amanda. Meanwhile, Corvax, a servant and the villain of the previous film, invents an invisibility device and, with his assistant named 'Thimbo (the Terrible)', a thief on parole, plans to kidnap Amanda, to get revenge on Bob for tricking him and taking Sylvia away from him.
Corvax and Thimbo succeed in kidnapping Amanda and they get away on Nigel's yacht. However, Amanda sinks the boat by pulling the plug out of the hull. The three manage to survive and they go to Corvax's hideout – a small hut which in fact turns out to be Corvax's operations centre. Meanwhile, Muzzy, Nigel, Ezra, Bob and Sylvia follow Corvax's trail, recover Nigel's yacht and track Corvax to his hideout.
At the same time, Corvax and Thimbo have a problem: Amanda gets hungry and wants to eat; while preparing the food, Thimbo lets the invisibility device loose and it is picked up by Amanda, who activates it. Corvax and Thimbo try to find Amanda, but fail. Muzzy, Nigel, Bob, Ezra and Sylvia enter the hideout and confront Corvax. Thimbo confesses to Nigel that this hut is an operations center. Meanwhile, Amanda is found but she cannot be seen. Muzzy constructs another invisibility device and uses it to make Amanda visible. All then go back to the palace. In the end, Corvax and Thimbo ride with sheep, to receive the unknown ultimate punishment offscreen (although it is accordingly known that in Britain it means 250 years in prison).