Stepper -- of course! <slaps.forehead>
Thanks, VERT.
Jackpot might work too, as could Zoom-Zoom.
They could modify the name to approximate Zoom-Zoom, like maybe Vroom-Vroom (although that would be challenging for a lot of Japanese speakers to correctly pronounce). Perhaps they could use the equivalent Japanese onomatopoeia, such as Burun-Burun or Buun.
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