The most familiar creation of the S.Y. company is the Robot with Spark, often called the Sparky Robot (not to be confused with the primitive Yoshiya Sparky Robot). Along with the small Mighty Robot this is one of the most common of tin robots. It shares the flapping feet movement and the reds spark panel. The box has proven to be elusive and more than doubles the price.

Take a look at the Noguchi version with the spinning antenna: it proves some sort of link between the companies

The common version is the silver one, but there is a range of colours, all of which are highly prized. There's metallic pink, magenta, blue and (though I've never seen one) a green one.

This robot came in a plain box, though there's a red version box below.

The boxes are all the same, though there is an example box with a magenta coloured robot. I guess that this accommodated the red one!