Writing and distribution for this series were handled as a joint effort by Marvel Productions and Sunbow Productions. Animation was produced overseas, primarily by Toei. The series was animated on an enormously rushed schedule, due to the need to get episodes on the air in sync with the toys appearing on shelves. That, combined with the vast number of characters and the difficulties involved with the overseas animation process, resulted in a cartoon that is notoriously riddled with animation errors and other mistakes. The producers were often aware of these mistakes, but tight deadlines left them no time to correct them.