The Hockey Stick is a secret weapon found in Warrior Within.
The sword can be found anytime after you obtain the Scorpion Sword. It's located in the wall next to the third life upgrade. This is the second strongest secondary weapon available to the Prince, equalling in durability and nearly equalling in damage rate with the Light Sword, and only slightly behind in attack rate, but having an advantage over the sword as unlike the sword it causes no damage to the Prince.
After you obtain the Scorpion Sword find your way back to the Central Hall. Turn the turnstile so that the lever is facing the doorway with the save point fountain. Stand facing the opposite doorway and walk up a bit and to the right. You will find a ledge that is one step lower than the area around you. Walk down and grab on to it. Jump to the opposite ledge and jump back and forth to slowly make your way down. Once you reach the bottom drop down to the ledge below it.
Wall run to the next wall and get ready to jump off and back and forth to make your way up. Wall run again and when you reach the end wall jump to slow your descent once more, you'll eventually grab onto a ledge. Make your way to the doorway that is next to it, but don't go in. Instead keep going on the rocks until you see the area where sand is falling. With the Scorpion Sword in hand break the wall. Break the rack of weapons and pick up the hockey stick.