Bunch of caps charging in parallel and discharge them in serial. Reverse polarity should do the rest. Since the SAO also has some GPIO pins and I2C connect them to the high voltage as well, just cause more havoc.

My plan what to go for the GPIO/I2C pins.
Trying to change the 3.3V line would be too hard, with all the capacitance on the badge, possible the battery absorbing some of the voltage, and all the leds already sucking a lot of juice, requiring a very high amperage pulse. And thus some huge capacitor(s).

I think the general idea is a voltage multiplier, so (capacitor+diode) * n and PWM? not 100% sure. 

I forgot about those. Not sure how to use PWM in those. The Dickson Charge pump can work, but can't generate that high a voltage. Or would at least require high voltage capacitors everywhere.
Then there is to problem of switching this high voltage. I don't think MOSFETs like 200V.
The more I look into this idea, the more problems I'm seeing.

Anyway; thanks for your suggestion.

I don't think you switch that on and off, you just turn on pwm as a crude replacement for the necessary AC and aim that on everything else? not sure how the usb killer do it, but that's something discussed and probably open / explained somewhere :)