There is no location for Tyrogue in Soulsilver or Heartgold but according to Serebii you can receive Tyrogue from the Karate King in Mt. Mortar.

asked Mar 20 by Mr.K

You are most likely correct. The location guide doesn't have a lot of "special" locations like gifts, starters and so on.

commented Mar 20 by Pokemaster

Pokemashter for god's sake check your email I have Mike and Mew's support.

commented Mar 20 by JirachiCelebiMew

lol JCM.
Ok thats what I thought @ Pokemaster

commented Mar 20 by Mr.K

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I believe there is a mistake in the pokedex.