What breed of dog was used to popularize the phrase “Yo quiero Taco Bell”?

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Wikipedia results

1.Che Guevara in popular culture

Taco Bell dressed up a chihuahua like Che Guevara and had him state: "Yo quiero Taco Bell!", Spanish for: "I want Taco Bell!" When asked about the allusion

https://en.wikipedia.org/wiki/Che Guevara in popular culture