Theory

Theory page is here because we need to know What in god name happen to Sodor.

Official Canon Theory

 * Welsh Coal is preventing Engine from mutation if they have them before mutation and if Engine is mutation it maybe slow down Mutation
 * Engine and rolling stock: Henry, Percy, Edward, Toad, S.C.Ruffey
 * The beast can remove and attach Oliver face It use it to trick any engine into thinking it just Oliver
 * First engine who believed that it was Oliver is Duck
 * Oliver was mutated against his will
 * It was inside job of nuclear disaster

New Theory

 * NA [Waiting for new Story]

Old Theory

 * NA [Waiting for Theory to be false]