Sidney

Sidney is a forgetful blue Diesel engine and one of the nicest Diesel engines in the island of Sodor.

Appearances:

the missing Christmas decorations

Day of the Diesels

Trivia:

Sidney is the third nicest Diesel engine introduced in the tv series, the first being Rusty, the second being Derek,

he is very similar to Dory the fish From Disney’s Pixar’s finding Nemo and they are both blue.