As far as I know, Thunderball didn't impersonate Electro. Comics usually have distinct character arcs and storylines for each character, and this particular situation doesn't seem to be a part of it.
The 'best electro story' could be about a young inventor who discovers a new way to harness electro - magnetic energy. He uses this discovery to power an entire small town that was previously facing energy shortages. This story shows the power of innovation and the potential of electro - related technology.
Once upon a time, there was a small village near a big power plant. The villagers were always worried about the electro - pollution from the plant. A young environmentalist named Tom came to the village. He studied the electro - waste and pollution problems and found a way to recycle and purify the electro - waste. His story is a great example of how we can deal with the negative aspects of electro - related industries and turn them into something positive for the environment and the community.
I'm not entirely sure specifically what a 'pony girl electro stim story' is as it could be very specific to a certain fictional or niche concept. It might involve a story where a girl in a pony - related context (maybe like a pony - themed role - play) has some sort of electro - stim experience, but without more context it's hard to say exactly.
I'm not aware of any widely - known 'pony girl electro stim stories' specifically. It seems like a very niche or specialized concept that may not have entered mainstream story - telling yet.