On November 5, 2010, the attraction's original recorded safety spiels were updated with the voice of actor Neil Patrick Harris.
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Neil Patrick Harris provides the vocals for a safety spiel added in late 2010, replacing the original safety spiels recorded by Dee Bradley Baker.
Players will take on the role of the main character (voiced by Neil Patrick Harris) who has the ability to defeat enemies (often zombies) with the power of rock as he searches for his love interest, voiced by Felicia Day.
All of the original voice cast from the Nickelodeon television series voice their respective characters in the game, including Danny Jacobs as King Julien and Neil Patrick Harris as Dr. Blowhole.
Neil Young | Neil Gaiman | Emmylou Harris | Neil Armstrong | Patrick Henry | Rolf Harris | Patrick Swayze | Neil Diamond | Mike Harris | Daniel Patrick Moynihan | Saint Patrick | Patrick Dempsey | Neil Simon | Ed Harris | Patrick Ewing | Patrick | Robert Patrick | Patrick Leahy | Patrick Stewart | Patrick Moore | Harris County, Texas | Neil Finn | Richard Harris | Neil Sedaka | Harris | Patrick Kane | Neil Smith | Neil Peart | Neil Morrissey | Julie Harris |
Among the guest stars in the series' 12 episodes were: Loni Anderson, Elizabeth Ashley, Ned Beatty, James Best, Michael Chiklis, Dom DeLuise, Douglas Fairbanks, Jr., Jack Gilford, Neil Patrick Harris, Doug McClure, Ricardo Montalban, Denise Nicholas, Austin Pendleton, Deborah Raffin, Helen Shaver, Maureen Stapleton and Kristy Swanson.
Faris provides the voice for Samantha "Sam" Sparks, "a weathergirl covering the caution who hides her intelligence behind a perky exterior." James Caan, Bruce Campbell, Mr. T, Andy Samberg, Neil Patrick Harris, Bobb'e J. Thompson, Benjamin Bratt, Al Roker, Lauren Graham, and Will Forte are also on the voice cast.
Neil Patrick Harris was Sugar's first choice to play Prince Gumball; she explained that she wanted to impress her brother Steve, who was "obsessed" with the Music Meister (portrayed by Harris) from Batman: The Brave and the Bold.