Doraemon

Nobita Nobi is so hapless that his 22nd century decendants are still impoverished as a result of his 20th century bumbling. In a bid to raise their social status, their servant, a robotic cat named Doraemon, decides to travel back in time and guide Nobita on the proper path to fortune. Unfortunately Doraemon, a dysfunctional robot that the familly acquired by accident (but chose to keep nonetheless), isn't much better off than Nobita. (myanimelist.net)