In ranger net, press X, R and left at the same time to unlock the option to enter a code. Then get a 12 digit/letter code, which was released on Pokemon.com, and enter it there.
you have to finish the game (each time you finish the game a new mission will appear) and the Mew mission is the third mission available.
you won't get another mission, you can only do the mission "recover the precious egg" to get a manaphy egg, which you can migrate to diamond pearl or platinum. you tap on ranger net, press R + X + <- and you can enter passwords in ranger net menu. American version:P8M2-9D6F-43H7 European version:Mg35-Cpb8-4FW8
After Mew there are no more missions except the bonus Manaphy Egg mission if you didn't take it yet.
You have to do the mission through Ranger Net.
on ranger net, u download special missions. for Pokemon ranger 1, u download a mission for dioxsis (or however u spell it), mew, and one more, i forget. for Pokemon ranger 2, there is triple the fun, including u can download an egg to ur Pokemon game and hatch it into a whatever-it-is and then evolve it into a manaphy.
:-( No. You can get him after you beat that ranger net mission about deoxys. BUT, when you beat him in the mission, he/she ranger sets it free. so u can't have him. :-(
on ranger net mission 1.to unlock ranger net,beat the game.(capture raikou,suicune,and entei.)
Special mission on the Ranger net
you have to trade it from Pokemon ranger after you complete it. it is a special mission on the ranger net.
its over by now
you get the manaphy mission after you obtain ranger net the way to get the mission is to press R,X and left then enter Mg35-Cpb8-4FW8 then you'll get the mission ;3
Manaphy can only be obtained by completing the "recover that precious egg" mission on the ranger net on Pokemon Ranger. Once you get the egg on ranger net, then you can transfer the egg from your ranger game to your diamond/pearl game and pick it up at any pokemart. You can only get this mission on your ranger game after you after you complete it.
First choose the ranger net icon, connect to Nintendo Wi-fi, pick a special mission and then you can play on that special mission.