I always considered the short theme that plays when BoCo appears in "Buzz, Buzz" to be his theme. But it sounded incomplete to me, like it was the ending to a longer theme, so I extended it.
Thomas the Tank Engine & Friends is property of HiT Entertainment. Original Music by Mike O'Donnell & Junior Campbell. Recreation and extension by Toby's Windmill.
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Boco the Diesel Engine is engine number D5702 who works on Edward's branchline. Allies: Thomas...