How to beat Klungo in Banjo-tooie

After the cut-scene when bottles dies, go outside the house and follow klungo to the big tunnel. Klungo will be there and the boss fight will start. first he will grow twice his size and jump around the place, when he stops, jump and peck him. Then he will go in a force-field and throw potions at you. Avoid them and he'll grow again. keep doing what was written above and he'll give up.