Ape Escape 3 Cheats

Hidden monkeys (U.K. version)
On the title screen, hold R1 + R2 + L1 + L2 then (without letting go) press start. this will bring up the password screen:

blueman - Unlocks the BLUE PIPOTRON monkey
RATCH - Unlocks the RATCH monkey
2nd man - Unlocks the RED PIPOTRON monkey

Passwords (jp version)
Press L1+L2+R1+R2+START to enter password screen. All passwords musst be enter in hiragana:

rusarukeka - Gageru Ape
kuroihoumonsha - Kuro Sennin Ape
yumenokyouen - Mesaru Gear Solid
futarinosune-ku - Movie 28 and 2 Cinema Files with Mesaru Gear Cast
futarimenootoko - Pigaru Ape
rusagu-boisa - SAL-1000 Ape
sabaibaru - Survival Mode
ginganoraihousha - unlocks Ratchet monkey

How to Unlock Monkey Studio(US version)
To do this, you will need movie files, to get them, make sure you have the monkeys on yellow light or lower, and don't catch any of the monkeys in the area of the camera.

Then, step on the footpad behind the camera and press X, after 5 seconds, press X again to recieve the movie file.