However, some Pokemon such as Donphan have had both a Past Paradox and a Future Paradox form, with Great Tusk and Iron Treads as the respective new forms. The popularity of Paradox Pokemon has ...

There isn't anything fancy about Donphan, and its simplicity is part of why its appeal is so enduring. In Generation IX, not one, but two Paradox Pokémon were directly based on Donphan.