Catnapped!

Totsuzen Neko no Kuni Banipal Witt , Totsuzen Neko no Kuni Baniparu Uitto? , known outside Japan as Catnapped, is a 1995 Japanese anime feature film, directed, created and written by Takashi Nakamura, who was also its character designer. The animation was produced by Triangle Staff. The theme song of the film was performed by Mayumi Iizuka.

The cats soon reach their own world Banipal Witt, a world of incredibly strange variety. Suddenly, they run into the Sleeping Cat, the very support of Banipal Witt. If the Sleeping Cat wakes, their world would be destroyed. The two children soon find that Banipal Witt is far different than their home Three minutes in the human world is one day in Banipal Witt and the cats are only anthropomorphic in Banipal Witt Henoji having remarked that, because of the human world, their life expectancy has decreased. Both Toriyasu and Meeko are turned into anthropomorphic kittens by the sun of Banipal Witt which is magical in nature as soon as they set foot on Banipal Witt.Soon, the kids meet the leader of a resistance Master Sandada, a powerful wizard. Sadly, in the absence of the trio sent to find Toriyasu and Meeko, Sandada has fallen victim to a curse from Lady Buburina, a dictatorlike princess that has gone insane and due to an enchantment turns anyone she touches into a balloon. Sandada was unable to protect himself, because his last line of defense a mystic glove called the Sorcerers Arm was stolen by DohDoh, his apprentice that had fallen to insanity due to a curse. Master Sandada explains that he brought Toriyasu here to catch Papadoll, who has supposedly been wreaking havoc across Banipal Witt. ........

Source: Wikipedia