there are 20 Poketch in diamond and pearl there are 23 if you action replay
after beating the 1st gym go back to jublife city there is a building near the tv station where you can talk to the guy who gave you the pokecth it has red flags on it. he will give you the app and other apps after you beat the other leaders -talk to him and he will tell you how many badges you need.
hoenn
find them
look for them all over sinnoh
because you buy stuff likediamonds
in the land of orecavach(off of route 209)
There is no limit for how many apps you can have. That said, memory space will limit the number of apps you can have on the NDSi.
there many free apps and yes there are
in jubilife city go into the pokecth compony the 1 on the right. there will be a man looking like the person who gave you the pokecth talk to him. he will give you it. if he doesnt play for a while and go back. HOPE I HELPED!
there are 21 poketch apps
There are thousands of apps out there to download!
there are 25 apps for the poketch.