 If you liked
Doraemon (2005)
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 ...then you might like
Ninja Hattori-kun (2012)
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Comedy series aimed at kids about a protagonist with an unusual companion who helps the protagonist. In Doraemon it's a robotic cat with various inventions and in Ninja Hattori-kun it's a ninja with various ninja techniques. Both have similar artstyles as they are based on manga by same author. Also both are remakes of an older series with the same name.