Banjo and Kazooie must protect the Twinklies by defeating the three Twinkly Munchers positioned along the path to the Christmas Tree. After a muncher has been defeated, he will pop up again shortly after. You must get 10 Twinklies safely to the Christmas Tree within the time limit of 80 seconds.
The power switch appears on the back of the tree for Part 2.
Afterwards, the Twinklies will be scattered across the tree but there would be no power to support the lights. Then you have to fire three eggs into the light switch found on the back of the tree. A clock will start and you need to fly through the star on the top of the tree 3 times within the time limit. The closest flight pad is at the stack of presents.
The Jiggy that was enclosed in a case is now obtainable inside the Christmas Tree. To enter the tree, climb up the trunk.