is a Japanese/American animated television series based on the Transformers toy line. It is produced by Cartoon Network Studios and animated by The Answer Studio, MOOK DLE., and Studio 4°C. The series debuted on Cartoon Network on December 26, 2007 and ended on May 23, 2009. In Japan, the show debuted on April 3, 2010, on both TV Aichi and TV Tokyo.