Complete Survival mode. In the Japanese version, the word "Tatsujin" will appear in Hiragana at the title screen.
Ape Movie Studio option
While playing the game, look for a camera with activation pads found in various levels. When the monkeys are not on high alert (yellow or less), step on the pad and press X to get an option to shoot a movie clip. Press X again to get the movie file. The Movie Studio option will be unlocked after all twenty movie files are unlocked, and will replace the "X" at the menu. The monkey studio is found in the Cimian Cinema area of the Shopping District. In the Japanese version, view at least eight Saru movie files in the Saru Cinema. The Saru Cinema Studio option will replace the "X" at the Saru Cinema main menu. Select this option to edit or create Saru movies.
Ape Olympic mini-game
Available for purchase in the Hobby Shop for 1,500 credits.
Cheat Codes for Japanese version
Press L1 + L2 + R1 + R2 + Start to display the password entry screen. Then, enter one of the following passwords in Hiragana:
Gageru Ape
Enter "rusarukeka" as a password.
Kuro Sennin Ape
Enter "kuroihoumonsha" as a password.
SAL-1000 Ape
Enter "rusagu-boisa" as a password.
Survival mode
Enter "sabaibaru" as a password. Alternately, capture all apes then catch Specter a second time.
Mesaru Gear mini-game
Enter "yumenokyouen" as a password. Alternately, successfully complete the game to unlock this item in Hobby Shop for 573 credits. Successfully complete this mini-game to win 1,000 Gaccha Chips and unlock Hard mode. To get the Croc cap and infinite items, rescue all twenty hostages.
Mesaru Gear cast in Movie 28 and two cinema files
Enter "futarinosune-ku" as a password.
Pigaru Ape
Enter "futarimenootoko" as a password.
Control Mesal Gear Solid title screen
At the Mesal Gear Solid mini-game title screen, press L1 or L2 to change the background.
Finding hostages in Mesal Gear Solid mini-game
Use a Watermelon (Suika) Bomb near cracks in walls to find hostages.
Monkey tag in Mesal Gear Solid mini-game
Shoot a monkey with the banana pistol then do a combo attack.
Morphs
This will tell you when you get every morph you can get and what it is.
Morph #1- Fantasy Knight. Saru-mon's Immobile castle stage.
Morph #2- Wild West Kid. A Fistful of Bananas stage.
Morph #5- Dragon Kung Fu Fighter. Fists of Furry stage.
Morph #6- Cyber Ace. Future City Tomoki stage.
Morph #7- Super Monkey. After the first time you catch Specter.
Sarutimate Fighting mini-game
Available for purchase in the Hobby Shop for 1,500 credits. Successfully complete this mini-game to win 1,000 Gaccha Chips.
Secret Passwords
At the Title screen, press L1 + R1 + L2 + R2. Now you can enter the following codes.
Unlimeted lives
Go to the level "Monkey Panic The frozen promise".
Unlimited jackets
Go to hide-and-seek forest, go inside the house look inside the bucket next to the door there is a jacket: get it. Exit Hide-and-seek forest go back in the jacket will be there get it. You can do it again and again and again; as many times as you like.
Unlock Croc Cap and Infinite Items
You must rescue all 20 hostages.
Unlock Mesaru Gear
You can buy this after catching Specter. It costs 573 credits.
Unlock Survival Mode
You have to make sure you capture all apes and catch Specter a second time.
