Chavez was discovered by Monkey D. Luffy on an island inside Bonbori's first stomach. Chavez revealed to Luffy's companion Myskina Acier that in order to be ridden on, he must be made to laugh in a staring contest. Luffy unsuccessfully tried to get Chavez to laugh, and Acier managed to succeed by making his "smug face". Chavez then carried Luffy and Acier through Bonbori's stomach, with Luffy giving him his name.
When Chavez entered Bonbori's second stomach, the stomach acids started dissolving his feet, and he and his riders rested on a nearby bank. Acier bandaged Chavez's legs to allow him to traverse the acid, and Chavez then took Luffy, Acier, and Roronoa Zoro to the third stomach, where Alchemi lay. Chavez was left on the coast as Luffy and Acier headed inside a mine.