Question

What is the best HM slave early in the game of Pokemon crystal?

Answer 1

Well Psyduck is an awesome HM Slave - it learns Surf, Strength, Flash, Whirlpool and Waterfall.
Krabby also works :D
Later you can always use Mew as a hm slave :O

Comments

Is there a pokemon  that can learn all that and cut?

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I don't think there is any pokemon which can learn every HM barr Mew/Smeargle (through sketch)

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dragonite can knightofdragon

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Krabby/Kingler can learn all the water HMs, Cut, Rock Smash and Strength. Gyarados is a good HM slave if you don't want it for your actual lineup.