Mewtwo is on sky stairs. to find him there someone will need to give you a challenge request mission for it.
Mew is on Floor 30.
I guess because in Pokemon red rescue team if you release something it can still be found
Rayquaza.Also,you can get a challenge mission from Mewtwo challenging you at sky stairway and you get to reruit mew two
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.
30 floors in explorers of the sky. Mew is also there. its level is 46 or 47 i think mine is a level 47.
Rayquaza.Also,you can get a challenge mission from Mewtwo challenging you at sky stairway and you get to reruit mew two
a challenge request mission to fight him at sky stairs. he is usually lvl 80
get to the end of mystery forest not mystifying forest i think you have to battle dont know but you can recruit him
i do not have explorers of sky
You can not get mew until you recruit mew later in the game
two
in a certain poin of the game u will get four new dungeons {north west south east isles} they all contain a mew i think i am not sure or one might but to be honest idk what flr its on either