go to jubilife city and talk to the poketech directer (he is on the first floor once you walk into the poketech building). you must have at least 5 or 7 badges first
Chat with our AI personalities
Talk to the poketch company president (Poketch building, 1st floor). He'll give the app and many other ones, too.
it shows roaming Pokemon
There is a map of Mt. Coronet in the Sinnoh region.
if you mean the map marker you can catch mesprit Pokemon of emotions with it hope this helps
same as diamond/pearl