It would probably be one of two things considered that Mutia is split nearly in half by two varying different landscapes. Northern Mutia, small aircrafts and airplanes would be the most accessible- all boarding from Arenaria and delivering people to wherever they need be. There are small air runways all across the region to accommodate this method of transportation, even on some Routes.

However, Southern Mutia, people tend to buy, or rent Locoalmtr, Rolycoly evolutions native to Mutia that ride like a motorbike- just try not to huff any fumes it lets out. They're all terrain, and are incredibly fast at climbing and riding just about anywhere you'd need to ride on those rocky, difficult to traverse Routes. Can turn an hour long hike into a 10 minute joyride. The old Mutian Champ is said to be a popular breeder who rents them out to people.