To the unlearned observer, it appears natural that the roads in Hoenn are remarkably straight, and that its intersections are all wide and at right angles, for the shortest distance between two points is a straight line. Yet this comes in spite of an often unforgiving terrain, and fortunes in treasure were thrown away in antiquity to demolish obstacles and make these roads as straight as possible. The reason for this is because, while the fierce weather and tall mountains make mail delivery difficult for flying pokemon, and the best carrier birds of the Pidgey family are not natively found there anyway, Hoenn is home to a Linoone, a pokemon so poor at turning it is said to only be able to run in a straight line.
A sprinting Linoone has often been compared to a Rapidash or Arcanine in speed, and although sixty miles per hour does not quite measure up to those larger pokemon, a Linoone's short, lithe body can cross water nearly as easily as land or race over hills without any loss in momentum. As Zigzagoon they become accustomed to handling objects, and even if their parcel is knocked from them in mid-run they are alert enough to stop, go back, and Pickup the lost item. Their short height makes them even more valuable for top-secret communications, which have historically been carried in thin strips of tall grass which run along the roadside.
At times in Hoenn's history, their roads have been used for the other purpose in ancient era: the transportation of armies, in which Linoone still led the way. Indeed, rocketry doctrine was initially based on Linoone tactics, for when armies met, both sides loaded up their Linoone with explosive yet ghost-type attacks and sent them racing through enemy lines.