Hidden Power? Once you get through the Firey Path, there should be a guy standing in front of a tree. Talk to him and he'll give you it. From then on you can buy it from a man in Slateport Market.
it is a TM taught to Pokemon do you mean hiddden ability?
a TM is only for use once and a hmn can be used lots
Depending on the pokemon, it will randomly pick a type and strength of the move. It is a very unique attack.
Rock Slide is not a TM in Leafgreen. In Leafgreen Rock Slide is a Move Tutor move and the Move Tutor is hidden somewhere in Rock Tunnel.
There is no such TM, but the move is the Signature move of Dialga.
tm10
Some Pokemon learn AncientPower, but there is no TM for it. There's Hidden Power and Secret Power, though.
You need to get the TM hidden power
That TM is hidden somewhere in the power plant.
unkown idk if spelled right :O I believe there's another one but I don't remember what it was D: -EDIT BY DARKKID1000- unknown and ditto. the only move ditto can learn is transform. the only move unknown knows is hidden power. hidden power however is a TM so there for it can learn a TM move even though it is the only move it can learn. The truth is the only pokemon who by default can not learn a tm move is Ditto. Unless you use an AR with a code so any pokemon can learn any tm. that just throws everything off then but with out cheating the answer is Ditto ... after further thinking it dawned on me While Ditto can only learn Transform another pokemon came up that can't learn a TM move. so yes there is two however unkown isn't one... the second pokemon that can not learn a TM move what so ever is Magikarp. this makes your answer Ditto and Magikarp -----------------------------------------------------------------------------------
the tm 8 is the move Headbutt it is a normal type move.
It's not a HM anymore in Pokemon Diamond and Pearl, but it can be bought as a TM in Hearthome City Department.