It was set in animals universe and there were no humans. I think there was a villain who was a blue cat and used to make gadgets. And protagonist was a superhero but kept their identity hidden to public. Villain used to try to defeat the hero but always failed. There was nothing sort of special about the show other than I used to watch it regularly in mornings during my childhood. I'm from Nepal and I think it was aired in Nickelodeon but I'm not sure.
Could this have been Krypto the Superdog from 2005?
One of the most prominent villains is Mechanikat, a cyborg cat with a purple (not quite blue) colour scheme. Also pictured on the right is Krypto himself, who is indeed a superhero:
What doesn't match is that the series is set on Earth; Krypto's human owner Kevin is a prominent character.