A lot of animals can be forced into unnatural movement like this elephant. Horses bounce or hop on their front legs the same way when hobbled.

But it's not natural, and causes a lot of painful wear on their bodies from long term unnatural movement. No wild elephant would get around this way because it probably hurts. Imagine how sore you would be if you had to hop everywhere and couldn't walk? Just because you technically can move that way doesn't mean you ever would.