Claim: Goosebumps has a television series and two films in which Jack Black played both R.L. Stine as well as the voices of Slappy the Dummy and Brent Green in the 2015 movie while the character was played by R.L. Stine himself in the 1995 to 1998 TV series.
Evidence: Goosebumps 2: Haunted Halloween Jack Black Jack Black
(voice) Jack Black
(voice) Himself Character