You can't. Quite simply. I checked the shop all the way through, and you can't get one. (I wish they'd add it!)
You get HM Surf and surf there
You learn the HM surf in Pokemon Tower of Defense 2 when Gary gives it to you during Viridian Ending.
surf is a hm. It is unlimited.
in the safari zone
Pokemon cannot forget HM's unless they're in Pokemon Mystery Dungeon. But, if its from Emerald, add another Pokemon to your party that knows surf and ask the move deleter.
Surf is HM #3. :-)
Get the HM Surf then teach it to a pokemon.
You get HM Surf and surf there
You need a water Pokemon and the surf HM
HM's and TM's
Surf is a HM so you can teach it to multiple pokemon.
teach it the HM surf
with TM and hm's
go to celestic town enter in the cave talk to the woman and you have the hm surf
You can get surf in Pokemon black and white by battling Cheren at the Twisted Mountain. Then Champion Alder will give both you can Cheren th HM Surf.
Celestic Town
its suppose to be surf