I was thinking of this, could a ceramic metal halide bulb work on a regular metal halide ballast?
I assume you are from the U.S., where the situation is quite more complex than in the 2xxV part of the world.
I assume the "normal ballast" you mean a ballast for the probe start lamps.
Then it won't work, their spec is quite different from the Pulse start the CMH needs.
And the HPS are again different ballasts in the US. Well, an exception is the S56, which is compatible with the 150W pulse start MH. When speaking about the load characteristic; but the ignitor voltage there may be marginal - HPS are happy with 1.5kV (so suffice with 1.5..2.5kV), for the MH is recommended to use more than the 2kV (so the 2..5kV ignitors).
But in most cases the HPS ignitor works well even for the MH: The specified peak voltage range is rated for the complete allowed load capacitance (so ballast to lamp cable length) range, but when you use really short wires (within a fixture), the real voltage is close to the maximum of the rated range. And that means even the HPS ignitor generates enough voltage to reach the specified minimum required by the MH lamp specifications.
And even when the peak voltage is lower, in my experience the only practical consequence is a longer hot restart delay (the lamp has to cool down further, so the lower ignition voltage bec omes sufficient to ignite the lamp). Maybe the cold temperature range would be limited as well (the minimum temperature would become a bit higher than the official rating)...