They appear as boars with round wheels replacing their legs, and a wind-up key on their back that controls their movement.
Wound-Up Road Hogs can charge for moderate damage to one target, and attack multiple targets wildly. Their wind-up key occasionally breaks, preventing them from attacking for the rest of the battle.
Its battle sound is Battle Sound 48 which falls under Code Numbers 903 for regular attack, 904 for Smaaaash! and 905 for Miss.
"A boar with a rigged up spring. And not the water kind, either."