Go to the Move Tutor in Pastoria City and talk to the guy inside the house next to the water. Their should be a guy standing in front of the house by the water. And make sure you have a TM for Ancient Power or that you're Pokemon can learn Ancient Power.
There has never been a TM called Ancient Power in any pokemon game. The nearest equivelent is the move Silver Wind (which is TM62 in both 4th and 5th games.) This is a bug type move and has the same effect as Ancient Power.
Tangela cannot learn Ancient Power in Pokemon Leaf Green. I believe you are asking because you want to evolve it to a Tangrowth which only can have in Pokemon Diamond, Pearl onwards.
Piloswine, Yanma and Tangela
By level up while knowing Ancient Power.
To get a Mammoswine in Pokemon Diamond/Pearl, you must teach your Pilowswine Ancient Power. Pilowswine can't learn Ancient Power, so you have to mate it with a male Pokemon that has the move Ancient Power. Wait awile then receive the egg from the old man and the baby Swinub has the move Ancient Power like the father.
nobody, use TM (if it evenexists)
Nobody, your Pokémon has to learn Ancient Power by either leveling up or breeding. There are no Move Tutors teaching this move in X/Y.
The Move Tutor teaches it to Pillowswine at any level, in exchange for a Heart Scale.
You cannot get the TM for Ancient Power in Pokemon Crystal. Ancient Power has yet to be a TM in any of the Pokemon games.
Some Pokemon learn ancient power as they level up.
there is no TM for ancient power.
Ancient power in not a TM.
Ancient power is not a TM in this. Hidden power however is given by the professor after 100 pokemon caught
There is no Ancient Power TM in Pokemon Platinum, It can only be taught by leveling up, Move tutoring or by learning it from a Pokemon from an egg.
no its a hm
its a move your Pokemon might learn
You can't buy it, it comes with a pokemon.