>>41782840Psychic types are among the most powerful entities in the Pokémon world, especially if legendary and mythical ones are left out the equation. Even if they're not statistically the strongest, a good number of Psychics have capabilities outside of combat, such as mind control or memory manipulation.
Take the Beheeyem family, for example. A lot of Psychic types can use hypnosis in varying degrees, but that can be broken under the right circumstances. Aside from a member of the Sinnoh lake trio, Beheeyem and Elgyem are the only Psychic types that can explicitly tamper with the memories of other beings. If your memory itself gets wiped or rewritten, there's almost no possible way to ever recover the thoughts and ideas that you've lost. If your memory tells you one thing, you'll be committed to believing it, even if everyone around you is telling you that the thing you believe is a lie. Even more extreme is if a mass memory wipe were to occur across a wide area. You could erase the very existence of certain events, provided no person was spared the mind wipe and that all documentation of said event were destroyed or hidden.
That's simply one of many things that could happen if a sneaky and ambitious enough person were to utilize Psychic types to gain power and leverage in the Pokémon world.