Nidoking can‘t learn Thrash at Level 1. Thrash can only be learned at Level 23 by Nidoking. You cannot have both Thrash and Horn Drill in the same moveset UNLESS you use TM07 on Nidoking. So evolve Nidorino at Level 23 with the Moon Stone, and teach it Thrash.
Regarding this, does Nidoking learn moves after evolving?
If you evolve Nidorino after right after evolving from Nidoran, then Nidoking can only learn 4 moves by leveling up. However, if you wait to evolve Nidorino until level 43, he’ll learn 6 moves up to that point, including his most powerful level-up poison move, Poison Jab.
what level should I evolve Nidoking? At level 22, Nidorino gets Horn Attack, which is decent in-game. Nidoking get’s Thrash at 23, and it’s your choice whether to have Horn Attack or Thrash. If the former, wait till you Nidorino is 22 level and then evolve it, or else evolve it right away.
Furthermore, what is the best level to evolve Nidorino?
What I recommend is evolve your Nidorino sometime before level 23 and Nidoking will learn Thrash instead. Then you can teach it Earthquake and Sludge Bomb later. You’ll probably find those TMs before Nidorino would get to level 43 anyway.
How do you evolve a Nidorino?
It evolves from Nidoran♂ starting at level 16 and evolves into Nidoking when exposed to a Moon Stone. It is related to Nidoran♀ and, starting in Generation V, can produce Eggs that contain either Nidoran♂ or Nidoran♀ when bred with Ditto.