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But nowadays, all good Dragon type Pokémon can learn Earthquake, so that definitely dents the defensive stance of Steel types. Most of the steel types prefer stalling, like Corviknight or Necrozma-DM, with only exception being Zacian-C.
I remember that choice scarf boosted Fishious Rend from Dracovish was so strong that it could wipe the entire opponent teams if they don't have resistance to water.
For Dragons who use stat boosting moves, then the best way is to use things like Whirlwind or Dragon Tail. People also prevent that setup by using Encore or Taunt, with former being so notorious that you will press enter with disdain !!