How do you get the don drum in patapon 1?

To obtain the Don Drum in Patapon 1, you must defeat the boss called the "Giga Golem." After defeating it, you will receive the Don Drum as a reward. Additionally, you need to make sure you have the necessary materials to craft the drum, which can include items like wood and stones. Once you have the drum, you can use it to enhance your gameplay and improve your Patapon army.