The Honeycomb Puzzle is the last of the jigsaw puzzles in Banjo-Kazooie. It is a picture of an Extra Honeycomb Piece and requires 4 Jiggies to complete (meaning, the player must collect 98 of the 100 Jiggies in the game to complete it). This puzzle is located behind the 882 Note Door near Dingpot at the top of the tower.
Unlike all the other puzzles in the game, where a world is unlocked (or the final battle), completing the Honeycomb Puzzle doubles Banjo and Kazooie's maximum honeycomb capacity (from 8 to 16). This doubled energy bar is displayed as red honeycombs - a red honeycomb turns yellow when depleted, and a yellow one turns blank as usual.