It is always a highlight seeing our culture represented in another medium when is not done as a tool to talk crap about our nation.
Mexico has a big sense of humour and we love things like Speedy Gonzales because he's a smart and good hearted guy, despite the outfit and putting the town he lives like lazy mice. Mario Odyssey level it was the Mexicans telling the others that were talking on our behalf to Nintendo about the offensiveness that we weren't offended but glad Nintendo looked our way.
So, of course I'd probably be on board with more Mexican representation in anime. That said I don't think I can really recall any Mexican character from the top of my head.