Mirai Shounen Conan

Synopsis

Conan and Jimsy go to the mountain where they are attacked by riders with masks. They are eventually captured and taken to Orlo. They make a deal that Orlo will forget about the giant pig if they can defeat another, albeit much smaller, pig. They do it, and Jimsy decides to work for Orlo. When Tera (Oslo's sister) tries to steal a goat from another villager Tito, Jimsy quits. Lana comes and gives her mother's memento to Orlo in exchange for the monster pig. Conan and the group leave.

(Source: Wikipedia)