Fuel Nugget

These special chunks of fuel are gathered from mice while near Daredevil Canyon on the Gnawnian Express.

Collect them by capturing the fuel-carrying mice on the train. The more you throw into the engine at once, the faster the train goes, so save up as many as you can! But don't wait too long: Due to their heat, you can only hold onto a maximum of 20, so make sure you stoke the train's engine regularly!