Ziggy was one of two rovers assigned to the USS Sagittarius in the 2260s. Along with Roxy, it was off-white in colour and had its name stencilled on its back panel. Of the two, Roxy was the fastest, but wasn't as maneuverable as Ziggy.
In 2268, Roxy and Ziggy were used to transport Mirdonyae Artifacts from an ancient Tkon weapon, built on a statite at Eremar, to the Sagittarius which had landed nearby. Before they could complete their task, Tholian starships attacked the statite, damaging the rovers. Both were left behind when the Sagittarius left, and were destroyed along with the Tkon weapon and the statite. (VAN novel: Storming Heaven)