Fineas and Tusk

Life can be confusing. One moment he was flying high above a barbarian realm in the Royal Skyship and his life made sense. The next the ship's deck had gone - disintegrated beneath his feet - and he was plummeting to his death. Then the one after that he was injured and trying to find his way back home. Walking through a realm full of savages and wild creatures. Hoping to cross a thousand leagues on foot without getting himself eaten. All of that Fineas understood. But why was there a wild boar traveling with him?