Horn: hank from Theodore tugboat
Personality: funny, playful, kind, gentle, goofy, silly, friendly, nervous sometimes
Cutie mark: a big happy smile
How he earn his cutie mark: he earn his for being every pony and locopony ray of sunshine and in general a nice and funny diesel shunter who likes to have fun and make new friends, he almost never serious unlike his slightly older brother S.M.G.3 and likes to have a good time and make others happy as well
Jobs: shunting, pulling small trains, taking engines to the works, making other ponies and locoponys happy (its not really a job he made it up as a excuse to make sad ponies and locoponys happy)