Jimmy's name pays homage to Polygon Jim, a former member of Sonic Retro (where the developers of Sonic Mania got their start), who was known for making a ROM hack of Sonic the Hedgehog where a Moto Bug is the playable character.
Jimmy is a regular-looking Moto Bug from Dr. Eggman's first generation of Badniks. However, Jimmy possesses two distinguishing feature: its large size for a Moto Bug and red rings around its pupils.
During the Titanic Monarch Zone Act 2 penultimate fight, Jimmy was modified to resemble a bulky motorbike with long tail pipes and thick wheels.
Jimmy was acquired by the Heavy Rider as her steed sometime during the latter's stay in the Green Hill Zone. From then on, the Heavy Rider rode Jimmy around wherever she went.
Later on, the Heavy Rider and Jimmy (now a bulky motorbike), would chase down Sonic and co. when Dr. Eggman briefly sent the trio to its section of the Titanic Monarch Zone during what seemed like their final battle.
Jimmy is shown to be rather wild and restless for a Moto Bug. Its eyes may also indicate a looney and chaotic nature.
Powers and abilities
Jimmy has proven itself to be faster than the average Moto Bug from his time. He also possesses a telescopic wheel which he can use to make surprisingly high jumps.