Late Export for You: The original series ran in Japan from April 19, 2004, to March 4, 2005, with a 6-episode OVA spin-off titled Tweeny Witches: The Adventures released on 22 November 2007. Both the original series and The Adventures were released by Media Blasters in North America in 2008 and 2009 respectively.
Market-Based Title: The Japanese producers came up with the English title themselves. Though it sounds odd, it is somewhat more fitting of the actual series than the Japanese title, which translates to "Magical Girl Squad Arusu".
Out of Order: "A Heart Sealed Away" is the second episode of The Adventures in the original Japanese release. The North American release, however, positions the episode as the fifth.
Voiced Differently in the Dub: Lennon is an androgynous boy who is assumed to be a girl, with a young, high-pitched voice that can pass as both masculine and feminine. The Italian dub, however, gives him a blatantly deep voice that makes one wonder how anyone could think he's a girl.