Misdreavus is a Ghost type Pokemon available only in Pokemon Pearl (of the fourth generation games). It may be traded over to Pokemon Diamond.
you have to trade it over from platinum because it is not in the unova pokedex
Super rod all over the place until you find a wailmer
Moltres is a legendary Fire and Flying type Pokemon. It does not appear in Pokemon Gold, but may be traded over from a first generation game. In the reboot of Pokemon Gold, Pokemon HeartGold, Moltres is encountered in Mt. Silver.
There is no trainer in Pokemon Platinum with a Manaphy. However, you can trade with someone who has a Manaphy, or complete the special Ranger mission in Pokemon Ranger and transfer the Manaphy egg over to Pokemon Diamond, Pearl, or Platinum.
you might be putting the same number all over again to find the right Pokemon press in their national dex number except for 493 which is arceus and only goes up to 493
you can find the Pokemon again but you have to start the chain over
You can't "find" him. You have to trade the egg from Pokemon ranger over to platinum, where you can hatch it.
you get it over a trade.
if the game has a glitch
You can't, you must send it over from Pokemon Ranger.
you have to send it over from an older pokemon game
You go fast over holes and it gets harder but if you go slow you fall down
You can't find tangela in diamond or pearl you have to transfer it over through Pal park
somewhere over the rainbow
This depends on the species. Some fish have a harder coating over themselves than others.
Considering that you are asking about Pokemon app over the Android device, then yes you can find Pokemon app available over the Google PlayStore and you can download and install it over your device from the Store.