Directed by Steve Socki   Written by Craig Bartlett   Joe Ansolabehere   Steve Viksten   Michelle Lamoreaux   Joseph Purdy   Cast Spencer Klein ... Arnold (voice) Dan Castellaneta ... Arnold's Grandpa (voice) Baoan Coleman ... Mr. Hyunh (voice) Dom Irrera ... Ernie Potts (voice) Maurice LaMarche ... Big Bob Pataki (voice) Anndi McAfee ... Phoebe Heyerdahl (voice) Laraine Newman ... Librarian / Kid With Map (voice) Mary Scheer ... Suzie Kokoshka (voice) Francesca Marie Smith ... Helga Pataki (voice) (as Francesca Smith) Kath Soucie ... Miriam Pataki (voice) (as Kath E. Soucie) Steve Viksten ... Oskar Kokoshka (voice) Jordan Warkol ... Chocolate Boy / Jamie (voice) Produced by Craig Bartlett   Mary Harrington   Joseph Purdy   Donna Smith   Steve Socki   Steve Viksten   Original Music by Jim Lang

Additional Info Premiere: March 29, 1999 DVD Release: November 27, 2009 Country: Distributor: Shout! Factory Websites: Production Companies Nicktoons Productions Nubian Nights Worldwide Games Animation (seasons 1-3) Nickelodeon Animation Studios (seasons 4-5) Nickelodeon Network Nicktoons Productions (1996-2004) Snee-Oosh Productions Distributors Nickelodeon Network   (1996-2004) (USA) (TV) CBS All Access   (2020) (USA) (video) (VOD) CBS   (2001) (USA) (TV) Nickelodeon   (USA) (TV) Paramount Home Entertainment   (1997) (USA) (VHS) Paramount Home Entertainment   (2001) (USA) (DVD) Shout! Factory   (2011) (USA) (DVD) (season one) Shout! Factory   (2012) (USA) (DVD) (Season Two, Parts One and Two) Rating Stats Overall Rating -- / 10 Our Rating -- / 10 Your Friends -- / 10 Male Users -- / 10 Female Users -- / 10 Site Ranking #2,844 / 21,075 Site Ranking