Hidden Monkeys!

Here is a list of hidden monkeys along with the stage they're in, where they are in the stage, any additional info, and a picture of them in the monkey radar. I checked to make sure that I typed the codes correctly, so how they're typed is how you should enter them, which includes capitalization. Here goes:

Name: Spork

Stage: Hide-n-Seek Forest

Location: Inside the Cabin Near Wolfy-Mon

Code to Unlock: krops
Additional Info: He's based off of the main protagonist in AE1, Spike.

Monkey Radar Picture:

Name: SAL-1000
Stage: Saru-mon's Castle
Location: Second exit in the Super Monkey room
Code to Unlock: grobyc
Additional Info: None
Monkey Radar Picture:

Name: Pipotron Yellow
Stage: Winterville
Location: Inside the hut to the right when you start.
Code to Unlock: yellowy
Additional Info: Appears in the unlockable "Mystery Movie" along with Pipotron Red & Blue.
Monkey Radar Picture:

Name: Shimmy
Stage: Winterville
Location: Second exit in the Super Monkey room.
Code to Unlock: 2nd man
Additional Info: He's based off of the main protagonist in AE2, Jimmy.
Monkey Radar Picture:

Name: Pipotron Red
Stage: Toytown
Location: Building Block area
Code to Unlock: redmon (redman also works)
Additional Info: Appears in the unlockable "Mystery Movie" along with Pipotron Yellow & Blue.
Monkey Radar Picture:

Name: Pipotron Blue
Stage: Airplane Squadron
Location: On the far wing of the commercial jetliner/through the exit near Prince Bertus on the commercial jetliner.
Code to Unlock: coolblue
Additional Info: Appears in the unlockable "Mystery Movie" along with Pipotron Red & Yellow.
Monkey Radar Picture:

Name: Dark Master
Stage: Kung-Fu Alley
Location: Inside a room with the entrance blocked by a wall with a Dragon Kung-Fu Fighter button on it. To get to it (because it's kind-of hard to find), go through the door (not the restaurant door) at the end of the city part, go across the 3 dropping platforms and climb up the pole.
Code to Unlock: blackout
Additional Info: All of the other hidden monkeys have some significance, but he was just randomly added.
Monkey Radar Picture:

Name: SAL-3000
Stage: Space-TV Fortress
Location: Second exit in the Super Monkey Room; hit the button moving around in the 5 depression on the wall to reveal him.
Code to Unlock: SAL3000
Additional Info: He's (apparently) an improved version of SAL-1000
Monkey Radar Picture: