Originally Posted by risrilla
How rare is it to find a Mew?
Actually the chances of Mew spawning is pretty low. The chances of one spawning range anywhere from 0.21% to 1.26% (highest chances of running into one are from floors 94-98).
Originally Posted by Hoshika
I think it's... 9%. Something like that.
That would be the chances of you recruiting
a Mew after you've found one if you have no bonuses. If you are at least level 90 and are wearing a Friend Bow then the chances greatly improve to 43% chance of recruitment.
In other words, it should take the average person probably about 2 runs through before you catch it (assuming you are level 90+ with a Friend Bow). What I would do is run around floors 94-98 for awhile and bring a Luminous Orb so that you can see when and where a pokemon spawns and is. Other items I would bring would be some Huge Apples and some Max Elixers.