I want to teach my Houndoom sucker punch in soulsilver, is there a TM somewhere or is there a certain move tutor i need to see?
http://pokemondb.net/pokedex/houndoom Houndoom learns Sucker punch as an egg move which means if you get a houndour from an egg, then evolve him, soon enough, Houndoom would learn Sucker Punch
Hope this Helps ;)
To teach Houndoom, Sucker Punch, you'll need to breed it with any Pokemon in the Field group.
Hope This Helped :D