Level skip:
Press Up, Square, Triangle, Square, Triangle, Circle, Up during game play.

Hidden Back In Time level:
To enter the hidden level in Back in Time, enter the Back In Time level door from the opposite side.

Hidden Autumn level:
Go to the Autumn level hallway and go to the right to find a black wall. Double jump through the wall into a hidden hallway, and enter the door at the end of the hall.

Clock bonuses:
Collect the clocks during the game to get bonus points. The points can be used to unlock the following bonuses.

Character Sketch (1 point)
Background Sketch (2 points)
Storyboard (2 points)
Backgrounds And Characters (1 point)
Behind The Scenes (2 points)
Intro Storyboard (3 points)
Hidden Autumn Level (3 points)
Hidden Past-Present Level (3 points)

Defeating the Red Hairy Monster:
Leave the sheep in the Annex and walk into room where the Red Monster (Sherman) is located. Immediately speed past the Monster on the left side. Sync your jump with his, and jump towards him and over his ring. He will chase you, but do not let him squash you. Speed around him in tight circles until he gets dizzy and falls down. If you do get squashed, just run away from him until you pop out of it then try again. After he falls, quickly grab the sheep and lay him on the button. When the quadra-platform cools, jump on it and continue to jump onto the platform on the right until it spins clock-wise enough times to lower the lens over the torch (and shine a beam on the Red Monster). Repeat this step two more times with the other lenses until Sherman falls across the lava and creates a "bridge." Get your sheep and walk over him to the goal.

View all bonuses with only a few time clocks:
To view all the bonus materials and hints without having to collect all of the time clocks, do the following. First, disable autosave then collect at least three time clocks throughout the game. Once you have done those things, go to the bonus section in the studio and purchase a bonus with the clocks you have. View the bonus material, then exit out of the bonus section back into the studio. Press Start and exit the game without saving. Reload your game and when you reach the studio again, go back to the bonus area and purchase a different bonus. Continue to exit without saving and purchasing new bonuses until you have seen them all.

Defeating the Dragon:
Go to the one weird Lost In Time level. Get the clock and go back in time near to where Sam the sheep dog is found. A Dragon should be in front of you. Go back to the future, and the Dragon will go with you. Sam will know that the dragon will try to burn the sheep. Sam will run down to the Dragon and punch him away. This trick will not work if you are not in Sam's area.