This series is also known for its darker undertones and story plots, taking darker routes than in previous series. The anime has become controversial over the decade, with debates about how appropriate this show actually is for its "target" audience, especially due to the Lovecraftian nature of the last arc. The English dub is more lighthearted dialogue-wise, though still not as much as previous series. Tamers aired in Japan between April 1, 2001 and March 31, 2002, whilst an English-language version by Saban Entertainment aired in North America between September 1, 2001 to June 8, 2002. A manga adaptation by Yuen Wong Yu ran between April and October 2004. It was succeeded by Digimon Frontier.