The term 'Cartoon Chihuahua' can be broken down into three crossword solutions: PESOS (5 letters), PESO (4 letters), and REN (3 letters). PESOS is the plural form of the Spanish word for 'PESO, ' which is the unit of currency in Mexico and other Latin American countries. PESO is the singular form of the same word. REN is a Japanese manga series created by Rumiko Takahashi, which follows the adventures of a young girl named Ranma Saotome.