To slay the Yian Kut-Ku bird you will need:

- Any type of light bow equiped with a zoom scope (and plenty of ammo)
- A few sonic bombs (maybe 2)
- A paintball
- Three psychoserums
- Potions and mega potions and a good type of armour

First use the psychserum to track the Yian Kut-Ku and run there as fast you can and use the paintball on it to keep track of it. Then climb up onto a high platform where it can't attack you and keep on shooting it. If there isn't a platform:

1. Wait somwhere else untill it moves to a more suitable area or...
2. Run around shooting it and when it charges at you press X to roll away and then shoot it again.