Yes, yes you can. Just beat Dialga, and keep going to Spinda's Cafe untill a Pokemon appears with a job for a place called Mystery Jungle or something like that. Then, go to the end of the dungeon. Mew will come and battle you, and he will give you the Grass Cornet. If you are lucky like me, Mew will "have a special connection with you" and join you. I got him X3 if he doesn't join you just keep going back untill he does. its a good idea to carry a Golden Mask or Amber Tear to increase your chance of getting him.
Mew is on Floor 30.
I guess because in Pokemon red rescue team if you release something it can still be found
i do not have explorers of sky
You can not get mew until you recruit mew later in the game
Mystery Jungle is one of the places you can go by receiving a special top-secret mission from a Pokemon in Spinda's Cafe. You can find Mew at the end of that dungeon, where you fight it and there is a chance of recruiting it. Keep trying until you do.
get to the end of mystery forest not mystifying forest i think you have to battle dont know but you can recruit him
you have to get the mystery jungle mission (hint: you have to rescue scisor and he will give you secret rank. to do that you have to beat dialga and go to blizzard island. Mew is the boss of Mystery Jungle.
you can not recruit mew but you can recruit mewtwo cya later
Its not in the explorers of sky
It may take several attempts to recruit legendary Pokemon in Explorers of Sky.
Yes, Arceus and Shaymin are both featured in Pokemon Explorers of Sky.
Why are you playing explorers of sky? You should be playing the real Pokemon games.