Bulgy first arrived on Duck's branchline; he wasn't friendly like Bertie. And he talked really differently to Duck making Duck upset, Bulgy also wanted to "free the roads" like the sign on top of him says.
When Bulgy was stuck, he was under a bridge; the passengers were inside him and were supposed to be in Duck's coaches. Bulgy had stayed in the bridge all nighttime and woke up next morning finding hens.
Bulgy was sent to the Sodor Henhouse; and got a new green livery. He was pleased.
Bulgy is a double-decker bus who wanted to "free the roads". He is different often not by just freeing roads, freeing rails also.