How do you get mew in Pokemon Mystery Dungeon blue?

Answer 1

In the buried relic u need a music box beat regirock on floor fifteen then beat regice on floor thirty then beat registeel on floor forty and pick up what they dropped then use an escape orb and go to buried relic again and mew should be on floor three hoped this helps -Cait-

Answer 2

Location & How To Unlock(Skip this information if you have already unlocked the dungeon Buried Relic and see "Recruiting Mew")

Mew is located in Buried Relic, F36 - F98. To get this dungeon you must first clear Stormy Seas (and Pitfall Valley) and continue until Pelipper delivers another issue of Pokemon News, stating an ancient ruin had been discovered, and that it is currently the main topic of conversation. After talking to the citizens in the Pokemon Square that stand in the center, you can go to Buried Relic. This dungeon has three bosses (Regirock, Regice and Registeel, all farely easy - and Mew is not considered a boss.) After clearing all the three boss matches and obtaining all three Regi Treasures (Rock Part, Ice Part and Steel Part) the parts fuse into a Music Box, which will allow you to encounter Mew whilst exploring the dungeon. Without this rare item you cannot find Mew.

Recruiting MewRecruiting this rare Pokemon can be a difficult thing to do; there are many ways to raise the recruit rate. Mew's recruit rate is an unfortunate 0.9%, possibly raisied by any of the methods below. Mew is most likely found between floors 94-98. Mew will not appear on floor 99, just in case you were wondering.

LEVEL - you get a bonus 24% if your level is over Lvl. 90

ITEM - Holding a Friend Bow gives you an extra 10%

RUMOURS CORRECTED - just a note, Rescue Team Ranks will NOT increase your recruit rate, nor will your leader's IQ rate.