What level does onix learn rock throw?

Onix does not learn Rock Throw through leveling up.

Instead, Onix can learn Rock Throw through the following methods:

* TM39: This is the most common way to teach Onix Rock Throw.

* Breeding: Onix can inherit Rock Throw from its parents if they know the move.

It's important to note that the availability of TMs and breeding methods can vary between different Pokemon games.