to go a little further you have :
Black & Mortimer (both detectives) in Great Britain
They have Calvin & Hobbes (the little boy and his speaking tiger)
The very famous American Superman (coming from the planet Crypto), Spiderman (the man bitten by a radioactive spider) and Batman.
To stay in the States there are Mickey Mouse (Topolino in Italy) and his girlfriend Minnie Mouse (Topolina in Italy) and Donald Duck (Paperino in Italy) and his girlfiend Daisy Duck (Paperina in Italy).
In Belgium you have the Schtroumpfs (Smurfs in English)
In France again you have Spirou & Fantasio (and their squirrel Spip)
The Marsupilami (a strange animal very kind and strong with a sooooooooooooooooooooo long taillllllllllllllllllllllllllll)
the nationality I do not remember : You have the cat Garfield.
I did not know that Mafalda was from Argentina. I find her very funny. Thanks Paola.