Party Horse An alien pod crashes onto Earth and an alien horse known as Party Horse turns to Mordecai and Rigby to help him pass a U.S. History test. Details Casts Videos Galleries Posters Season Lists Title Party Horse Genres Animation Comedy Release Date 2015-03-19 Episode Runtime 00 Hours 11 Minutes Season Number 6 Episode Number 23 Production Companies Cartoon Network Studios J.G. Quintel... Mordecai / Hi Five Ghost ... William Salyers... Rigby (voice)... Mark Hamill... Skips (voice)... Sam Marin... Benson / Pops / Muscle Ma... Regular Look at Regular Show (Clip) Original Size (1920x1080) Original Size (1280x720) Original Size (3840x2160) Original Size (1920x1080) Original Size (3840x2160) Original Size (3840x2160) Original Size (3840x2160) Original Size (3840x2160) Original Size (3840x2160) Original Size (3840x2160) Original Size (3840x2160) Original Size (1600x900) Original Size (1280x720) Original Size (1920x1080) Original Size (2973x1673) Original Size (1920x1080) Original Size (1920x1080) Original Size (1920x1080) Original Size (1920x1080) Original Size (3840x2160) Original Size (3840x2160) Original Size (3840x2160) Original Size (3840x2160) Original Size (1920x1080) Original Size (1920x1080) Original Size (1000x1500) Original Size (2000x3000) Original Size (1000x1521) Original Size (2000x3000) Original Size (2000x3000) Original Size (2000x3000) Original Size (2000x3000) Original Size (1708x2562) Original Size (680x1000) Original Size (641x938) Original Size (2000x3000) Original Size (960x1440) Original Size (1708x2562) Original Size (667x1000) Original Size (1000x1500) Original Size (552x827) Original Size (680x1000) Original Size (832x1280) Original Size (600x900) Original Size (1200x1800) Original Size (2000x3000) Original Size (1708x2562) Original Size (1708x2562) Original Size (1856x2644) Original Size (667x1000) Original Size (2000x3000) Original Size (1200x1800) Original Size (720x1080) Original Size (720x1080) Season 1 12 Episode(s) 2010-09-06 Season 2 28 Episode(s) 2010-11-28 Season 3 39 Episode(s) 2011-09-19 Season 4 40 Episode(s) 2012-10-01 Season 5 40 Episode(s) 2013-09-02 Season 6 31 Episode(s) 2014-10-09 Season 7 36 Episode(s) 2015-06-26 Season 8 31 Episode(s) 2016-09-26