It depends. In some remote places in the world there are animals that haven't been discovered so yes they can be real. Man doesn't know all things living or dead.
no
Yes they are real.
Although there are many thousands of undiscovered species, it is unlikely that any of them are trolls.
No, all Pokemon characters are fictitious.
No, zombies are mythical creatures and they are not real.
no
They are not real creatures.
Some legendary creatures are real while others may be a result of myths or fables. The Phoenix, the Mummy, Dinosaurs, and Mammoths are a few examples of legendary creatures.
The Undiscovered was created in 1997.
Undiscovered is an adjective.
They were real but the transformed them into different creatures.
None, by definition. If a creature is real, then it is not mythical.