>>21136413It learns Mimic in Gen3, and you can use the Mimic/Transform glitch in Gen4 to teach it Sheer Cold.
>Get Machop in Gen3>Clone it and send clone to Gen4>If it obtains No Guard upon evolution teach the original still in Gen3 Mimic>Clone and send over Machop with Mimic to Gen4 and attempt to do the Mimic/Transform glitchAnd to do that you'll need a Smeargle with Sheer Cold and Rage along with a Ditto.
>Get into a double battle>Have Machop Mimic Transform>Switch to Smeargle>Have Machop Transform into Smeargle>Then have it use RageAnd there you go, also you can do that to Flareon to give it moves.