Dennis

Dennis is the ventriloquist dummy that Amy Kramer has. Dennis is an old, and worn out dummy. His head pops off, and everytime she moves his head.

Night Of The Living Dummy II
Amy Kramer is getting tired of Dennis, so she keeps asking her father to buy her a new one. On family sharing night, Dennis's head pops off, and she is embarrassed. Her father then tells her he bought her a new one. She found the case, it read "Slappy" she opened it, and found slappy. After slappy has caused a lot of trouble, Slappy was chasing Amy, and Dennis came along, and tackled him. In the end saying "It's good to be back in the family" and a lot of chuckling.

Reading Between the Lines
It is believed by many Goosebumps fans that Dennis was alive all this time, or Dennis was Mr. Wood. It was also believed that Dennis was watching over Amy so anything terrible wouldn't happen. Other fans also believe that Dennis is Slappy's soul, when Slappy's head cracked open.

Trivia

 * The dummy that was used in Night Of The Living Dummy II "Dennis" was also used in "The Suite Life of Zack and Cody"