Paradox Pokémon Have Been With Us All Along?

Scarlet and Violet have brought in many new topics of discussion, but one of the most fascinating is that of Paradox Pokémon; apparently being time-displaced creatures based on ones we know from the modern day. But are these forms so special, or have we actually seen the likes of them before? Have Paradox Pokémon existed for years without us realizing? Only Celebi can answer for sure!