Splatter and Dodge (collectively referred to by Diesel 10 as "Splodge") were Diesel 10's bumbling minions. Both engines are simple-minded, awkward, cowardly and tend to banter. Splatter is the more talkative of the two, while Dodge is more intelligent. Although Percy fears them, they do not have the intelligence or villainy to match Diesel 10's. They enjoy watching Diesel 10's plans backfire, but are also prone to making a mess of things. Despite initially siding with Diesel 10, they seem reluctant to destroy a fellow engine, even a steam engine, and eventually abandon Diesel 10 in the end. What happened to them after that is unknown.
- Two Left Buffers (cameo, Dodge only)
- Splatter and Dodge have no allocated voice actors as of now.