As of my knowledge cutoff in October 2023, there is no official Pokémon ability named "Conqueror" in the main series of Pokémon games. Therefore, I cannot provide a detailed summary about its effects or any interesting facts directly from Pokémon canon.
However, the Pokémon franchise often introduces new abilities, items, and mechanics with each game installment. It's possible that "Conqueror" could be a fan-made ability, part of a spin-off game, or introduced in a future release.
If you have any more details about where "Conqueror" is referenced or would like to create a custom ability based on your own ideas, feel free to provide that information or ask, and I'd be happy to help you expand on it!