From Wikipedia: The original Petz games were developed by P.F. Magic. After earning revenues of $8 million in 1997, P.F. Magic was acquired by The Learning Company for $15.8 million in 1998.[5] In 2001, Ubi Soft (since 2003 Ubisoft) acquired the entertainment division of The Learning Company, granting Ubisoft exclusive publishing rights to 88 titles, including Dogz and Catz.[6] After Ubisoft acquired the series, some games that were actually Japanese in origin were localized under the Petz name. For example, Petz: Hamsterz Life 2 on Game Boy Advance is a localization of Hamster Club 3, and distinctly different from its DS counterpart, although both DS Hamsterz games were also Japanese-developed but published in English territories by Ubisoft.