The Frog Mecha was originally an ancient weapon found alongside the Stone Turtle. It was customized by Ptolemaic mechanics for modern combat. Per its namesake, the Frog Mecha is a hatchless vehicle in the shape of a frog with two exhaust pipes on its back. It travels by either hopping on the ground or transforming its front legs into propellers for flight. Because of Lucy's fondness for frogs, she was given the Frog Mecha.
Lucy's Frog Mecha has two attacks. Its standard attack is smacking enemy units with its stretchy rubber tongue. Its special is flying over enemy units and dropping a huge drill diagonally onto them.
- Lucy's Frog Mecha: The original.
- Lucy's Special Frog Mecha: A yellow painted vehicle secretly modified by a mechanic focused on drills. Its tongue is left stretched for a slightly longer time, and the drill is dropped straight down.
- Autonomous Ribbit Robot: A blue painted unmaned variant of Lucy's Frog Mecha. Unlike the former variants, he doesn't smack the enemies with his stretchy rubber tongue, it only appears flying over enemy units and drops one huge drill diagonally onto them, and then he retires.
- The full name "Lucy's Frog Mecha" comes from its concept art label.