Crunch can only be learnt through leveling up. Before getting the National Dex the only Pokemon you can find that learns it is Nidoran/Nidorina, after that Girafarig, Steelx. Snubbull/Granbull, Houndour/Houndoom, Raikou and Larvitar/Pupitar/Tyranitar.
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Crunch has never been a TM move...
RFDHDF
Crunch is not a TM move. The only way to learn it is by level up or by breeding.
the move deleter is right of the Pokemon gym in fuchsia city.
Use the HM move Strength.