Most PokeTch Apps can be received by doing something you automatically would. Here's a list of the things I know of:
Marking Map: You've gone back to Twinleaf Town, and walked over to the lake, and seen Mespirit. Professor Rowan will show up, and give you the ap.
Daycare Watcher: In Solaceon Town, go inside the Daycare Center. Besides the lady at the counter, there should be a guy sitting at a table. Talk to him, and he will give you the ap.
Counter: In the Veilstone Department Store, on the second floor, there should be three cashiers. The one facing to the side, or to the plant by the wall, will give you the ap.
The Luvdisc Pokemon Like Each Other Comparer Thingy: In Pastoria City, take the Pastoria Great Marsh Challenge. (It will cost $500 dollars, and your game is up once you've walked 500 steps) Catch five or more Pokemon in the Marsh, and when you game is up, the countrified rancher girl will walk up to you, and say something along the lines of, "Oooooh, did you catch five or more Pokemon? Yes! Yes, you did! Well, that's nice, so I'll give you this." The little cute I-just-found-an-item noise will play its jingle, and you can try it out!! It lets you compare Pokemon in your party to see if they like each other or not. (Most Pokemon turn away from each other.)
Most Other Poketch Apps: Go to Jubilife City!! At the T.V. Center, or with the manager, you can find tons of other apps. Sorry, that's all I remember, but I hope it helped!!
i dont think theres 20 apps
If you have an action replay there is a code for all poketch apps im not sure of the code but it does exsist.
Poke Tech 23,24,and 25 are all obtained through Nintendo Events. For a list of all the Apps go to: http://www.serebii.net/diamondpearl/poketch.shtml
poketch stands for Pokemon watch
Get the PokeMarker Poketch app from Jublife City Poketch building. It will show you where Mesprit is.
there are 21 poketch apps
there are 25 apps for the poketch.
There are 16 poketch apps in the whole game.
there is only 19 poketch apps
no,but when you do get the poketech you will have all the apps
pokemon
find them
at the poketch company building in jubilife. He gives u new apps after u beat the gyms. Check back every once in awhile.
speak whit everyone you meet and the poketch guy who gives you a new aplication for each badge.
look for them all over sinnoh
i dont think theres 20 apps
Your rival will give it to you sometime in the game.