You can only teach these moves to your starters after you defeat the Elite 4 and The Champion.Then go to route 228 and enter a house that is on sand, talk to the guy inside and he will let you teach Infernape/Empoleon/Torterra one ultimate strong move : )
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In the house to the immediate west of the Pokemart in Blackthorne City. There you will find the move deleter, the move tutor, the "ultimate move" tutor(who teaches any starter Pokemon with full friendship their ultimate move) and an old lady that will teach your Pokemon Draco Meteor, if they can learn it.
teach your starter Pokemon its ultimate move but needs to be a high level. venasaur=frenzy plant charizard=blast burn blastoise=hydro canon
In Pokémon Platinum the move tutor on Route 212 can teach it to your pokémon.
The Move Tutor can teach Luxray Superpower.
You have to learn it at the Platinum/HeartGold/SoulSilver Move Tutors.