According to the Season 2 DVD commentary, Soul-Bot was created to look after the children on Astrobase Go!, which was originally intended to be a futuristic school/space station orbiting the moon. Soul-Bot is powered by love, which it filters from the air and stores in its chest cavity.
Since Publick and Hammer have taken over the Astrobase, Soul-Bot was re-purposed into a therapist, painter's model for Doc Hammer, and occasional guitar player for duets. Soul-Bot is credited with H.E.L.P.eR.'s voice in the credits.
Soul-Bot's voice work is actually Jackson Publick doing a robot impression, which is then processed through audio filters by Doc Hammer to make it sound more mechanical. Reportedly, after his first few appearances, H.E.L.P.eR.'s voice sounds have simply been reused over and over.
Astrobase Go!'s post-credits logo sequence changed from episode to episode beginning with season two's second episode (Hate Floats). The new designs used Astrobase Go! music and featured animated concepts like Funeral Of General with Soul-Bot; Zoom in Red And Black Moving Robot Zoom Out (James Bond parody); General and Soul-Bot, The Moon and Sing-Along With Soul-Bot The Logo Has Audio and the lyrics at the end. Camera Zooms Pans Into Soul-Bot. In I Know Why The Caged Bird Kills The Kid Replaced General In ¡Viva Los Muetros! The Orange Gorilla Joins Soul-Bot. Soul-Bot Last Appearance In The Season 2.