Piston Gear.

Piston Gear is a mechanic in Ponyville, He has hes own shop. Everypony comes to him if something needs fixing, From complex problems, to simple tasks. He has a personality of his own, Loves to tinker, and invent stuff. He is organized, tidy and hes tools are hes everything. Blueprints are neatly stacked, Hees harness shiny and polised. He is one of the bigger pony's, can't fly, does not have magic, But he loves being who he is. The story plays in Ponyville. From there you can let your imagination run freely.