After Mew there are no more missions except the bonus Manaphy Egg mission if you didn't take it yet.
You can do that mission in both ranger games. Pokemon Ranger and Pokemon ranger shadows of almia.
In Pokemon ranger 1: do the mission in wintown in the highlands In Pokemon ranger 2: you have to get the yellow gem first
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.
it is in olive jungle
maybe yes...........
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
you have to trade it from Pokemon ranger after you complete it. it is a special mission on the ranger net.
you cant assign yourself to a misson on Pokemon ranger
You have to do the mission through Ranger Net.
there are no more missions
There isn't one
Visit any pokemart then talk to the Pokemon ranger there with the the ranger has a green hat (actually, you have to transfer it from Pokemon Ranger first.) Well first you have to get Pokemon ranger finish the game then go on ranger net and play the manaphy egg mission. Then finish the mission and trade it to your game. :) Or cheat! Transfer it from Pokemon Ranger.