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Oliver is an excavator who works for The Crotoonian Construction Co.
Oliver is a good mannered and hard-working digger; among the most useful for a variety of reasons! Besides being built with a powerful arm and handy caterpillar tracks, Oliver can work in various conditions or jobs with any attachment you give him; a bucket for basic digging, a shear tractor's claw for tearing down old buildings, a wrecking ball for basic demolition, and a drill for precise digging. He rarely gets impatient with the other machines and is always willing to assist younger machines.
Oliver's exact basis is unknown and appears to be a freelance design.
Oliver is painted brown with a pale green panel on his back and his number painted on him in red. Oliver has the cap rim of a builder's hat between his forehead and cab windows.