I have no idea if this is true or will ever happen, but according to Russian state media North Korea has offered 100000 "volunteers" to fight for Kremlin in Ukraine. With N. Korean made weapons (I have personally no idea what is the quality of DPRK made weapons, but most likely not as good as Russian).
article by the New York Post.
https://nypost.com/2022/08/05/russia...100000-troops/