Cuckoo Clock

The Cuckoo Clock is the name of an evil clock introduced in The Cuckoo Clock of Doom.

Summary
Michael's dad buys the clock at an atique store. Michael breaks it so that his bratty sister, Tari, will get the blame. Though, it being broken results the person who broke it to go back in time. Finally, when Michael is an infant, he fixes the clock, but when he is back in his normal timeline, he realizes that the time piece where Tari was born is missing, meaning she was never born.