Topo Urushihara is an italian mouse who befriended Tom and Jerry in the episode Neapolitan Mouse. He helped Tom and Jerry escape from the three dogs and he also feeds them two different treats and local delicacies.
In the ending of the episode, Topo, Jerry and Tom are chased by the three dogs. They find some big cheeses and throw them and the dogs trip on them, fell into the sea, and he then farewells Tom and Jerry when they're going back with the boat cruise.