Talking to Himself: Throughout the series, there is a number of actors who have voiced many numbers of characters. They include:
Michele Burks as Katy Kat and Cheap Cheap the Cooking Chicken in PaRappa 1.
Armstead Christian as PJ and Papa PaRappa in both the PaRappa game and its 2001 sequel.
Saundra Williams as Instructor Mooselini, Chunky Burger Restaurant Manager, and vocalist for the song "Funny Love".
Ryu Watabe as Joe Chin, Chop Chop Master Onion, PaRappa 1's TV Announcer, Ma-san, and Captain Fussenpepper.
MC King Kong Mushi's voice actor, Richard Bush, also does the voices of the Two Punks in both PaRappa games, and Chief Puddle in Um Jammer Lammy.
Dean Bowman, King Kong Mushi's Other Darrin in PaRappa 2, also does the Guru Ant.
Freedom Bremner as Boxy Boy and Hairdresser Octopus in PaRappa 2.
Urban Legend of Zelda: Rumors suggested that one could play as Sunny Funny or as Chop Chop Master Onion in the original PaRappa.
Creator Killer: Greenblat's stress with working on the anime (in which he was character designer and had no creative input), combined with the fact that he felt that he was unable to come up with anything as successful as PaRappa, effectively drove him out of the video game industry (although he with Matsuura attempted a failed comeback with the 2009 flop Major Minor's Majestic March).