Zelda Sacred Paradox is a Zelda x Pokémon crossover using the Pokémon FireRed engine. Although it only features an hour or two of playthrough, it is a unique concept, and the development is still in-progress.
It features familiar Zelda enemies and friendly creatures, such as Cuckoos, Octoroks, and Bokoblins. While it doesn’t feature things like the Physical/Special split, it makes up for it in pure creative potential.