The silver robot "Number One" is a modified Tomy Omnibot 2000, a 1985 toy which was created to cash in on the early-1980s robot craze. The gold robot "Number Two" is a modified Tomy Omnibot OOM, a related robot toy of a similar vintage which was also marketed towards adults in the US market under a separate brand name as the TTC Hearoid. (Its head design was later melded with the body and internals of the entry-level Omnibot 5402 model to create the Radio Shack Robie Sr., also for the US market)