Bash and Dash are the mischievous Logging Loco Twins, who know each other so well that they often finish one another’s sentences. They were sent to Misty Island along with Ferdinand for not behaving and being really useful whilst working on the Mainland, and because the engines have no rules to abide by on Misty Island, they live for fun and play. Very little work was done until Thomas landed there, and taught the twins that being really useful can be fun too. Now, they all work very hard with Ferdinand to please the Fat Controller.
Ferdinand is the biggest and most senior member of the Misty Island Logging Locos. He’s a gentle giant with a big heart, who can make special tweeting noises with his whistle. But despite being the oldest and the biggest of the Logging Locos, he will quite often let the younger and more boisterous Bash and Dash take the lead in most situations. A quiet old engine, he doesn’t say much, and quite often will be heard saying “That’s right!”
- Bash, Dash and Ferdinand will meet Winnie the Pooh, Ash Ketchum, Littlefoot, Simba, Sora, Mickey Mouse, SpongeBob SquarePants, Alex, Tai, Twilight Sparkle and their friends in Pooh's Adventures of Thomas & Friends: Misty Island Rescue.
- In that same movie, Tigger will refer to them as "Bashy boy," "Dashy boy" and "Ferdinand-boy", which they liked those nicknames very much.
- Bash, Dash and Ferdinand will see Pooh and his friends again in Winnie the Pooh and the Care Bear's Adventures in Wonderland.
- Bash, Dash and Ferdinand will join Thomas' team at the end of Thomas the Tank Engine Goes to FernGully: The Last Rainforest.
- Bash, Dash and Ferdinand are best friends with The Cutie Mark Crusaders (Apple Bloom, Sweetie Belle and Scootaloo), Diamond Tiara, Silver Spoon, Babs Seed and Gabby.
- Bash, Dash and Ferdinand are also best friends with Dumb-Bell, Hoops and Score.