Cynthia(pokemon league champion) will give it to you when you follow the team galactic grunt from Pastora City.
The Psyducks are right above Solaceon City.
Cynthia's grandmother gives you it after the bomb scare, which is after the Psyducks-ness. You need the SecretPotion to cure the Psyducks. You get that from Cynthia after you battle the Galactic Member you're supposed to stalk from Pastoria (The location you get the the SecretPotion is at the Valor Lakefront).
There are two ways. The first way is this: Go north from Solaceon to where the Psyducks were. Keep going north, then turn left. Eventually, you'll get there. But to get there, you have to move the Psyducks. To get rid of them, talk to one of the Galctic Grunts in Pastoria city. He'll run away. You have to follow him. Eventually, he will battle you. After, you will meet Cynthia. She will give you a secretpotion for the Psyducks. Go back to the Psyducks and give them the secretpotion. Then they will move. Tip: It is very foggy. I suggest bringing a pokemon thet knows HM Defog. The other way is this: Go east from Eterna city until you get to Route 211. Keep going east and you will get to Mt. Coronet. Move boulders and smash rocks. Go to the other side. Exit and you're there. To go this way, you will need HMs Rock Smash and Strength. Hope this helped!
The Psyducks are on the route right above Solaceon Town, next to the diner where they serve Moomoo milk. You need the medicine from Cynthia to get them to move.
In Pokemon Diamond the TM 90 is the move substitute.
go to Pastoria City then look for a team Galactic guy he will run away but keep on chasing him eventually you will have to battle him when you beat him (if you beat him) Cynthia will come up and give you an item to get rid of the Psyducks
You have to find Cynthia somewhere she will give you the seacretpotion. Use it on the ducks and they will run away.
yes as long as the move is available anywhere in the gamealthough Pokemon is awesome
It stands for technical move. there are lots of them on diamond.
mew
you mest get the hm strength.
the move bounce can only be learned in later versions of Pokemon like diamond and pearl, platinum; etc. after migrating them to those games.