All Working Grabbed By the Ghoulies Cheats - Xbox

Concept art
Get a Platinum Medal in Challenges #1, #3, #5, and #7 to unlock concept art pages.

Hidden FMV sequences
Complete Challenge #21 to unlock the "Original Promo Movie" and "Deleted Scene - Crivens Gives The Chair" options in the replay storybook.

Extra health
Enter the options screen and enable the "Butler's Brew" option. Now if you fall in any room, you will be given an option upon re-starting that room if you want Coffee and Waffles. Press [A] to select "Yes" and you will have double health.

Banjo-Kazooie references
You can see various pictures and statues of Banjo-Kazooie's "Mumbo Jumbo" in the rooms of the mansion.

Whenever you fight a "Ghoulie", listen. They often sound like creatures from Banjo-Kazooie.

Every time you enter the kitchen where Ma Soupswill is located, look on the billboard near one of the kitchen's doors. You will see a picture of Banjo and Kazooie.

Mini-game challenges
For every five "Rare books" that you find, you will unlock a bonus mini-game challenge at the mini-game screen. There are 100 "Rare books" in the game, which unlock a total of twenty bonus mini-game challenges. There is one "Rare book" in every room of the mansion. Challenge #21 is unlocked by completing the previous twenty challenges with a "Gold" or "Platinum" rank.