Majokko Daisakusen is a turn-based strategy game with action-style battles featuring characters from several famous magical girl anime series from the '60s, '70s, and '80s: Mahō Tsukai Sally, Himitsu no Akko-chan, Mahō Tsukai Chappy, Cutey Honey, Majokko Megu-chan, Hana no Ko Lunlun, and Mahō Shōjo Lalabel. It is in fact a reworked version of The Unholy War with all of the graphics, sound, and story completely replaced. The game itself, however, is essentially identical between the two releases.
Little Witching Mischiefs came about after Paul Reiche and Crystal Dynamics head Rob Dyer approached Bandai about getting the license to make a game based on SD Gundam, of which Reiche himself is a confessed fan. The Gundam game never happened, but they wound up with the rights to a number of old Toei magical girl anime instead, and Toys for Bob repurposed the Unholy War engine to make the game, which was only released in Japan.