When Zanbamon says he wont fight you go to Bulk bridge you will see Kial talk to her and she will say she saw Baronmon go to Protocol ruins.Go there and Baronmon will say "I can see the future,there are pigs everywhere!" Go to the inn and talk to one of the gatamon.It will say that Sepikamon has not been seen lately,he would be able to show that bully Zanbamon. Go to Shamon house and talk to it.Sepikamon will say"Please will you go find my mask?I cant go out without it.
Go to Azuka city,where the old man and lady that are trying to turn them self into digimon.Etamon will be there talk to him he will say that he saw it at Divermon lake.Go to Nick at Divermon lake and he will say "Have you seen Etamon,he has been pulling tricks on people." Go back to Etamon,talk to him and he will say "Mask...what mask? and then runs away.Go to Azuka sewers you will see Etamon.He says "Fine then take it!" He gives you the mask. Go to Shamon house,Sepikamon comes down from his hiding place and tells you to turn round.He will put the mask on.He will give you smelly herbs. Go to Zanbamon and he will let you past. Go through Jungle grave.And you will be in Pheonix bay.Go up and you will be in Ether jungle. In Ether jungle there is a place called Jungle shrine.Most of the time in Jungle shrine you find Numemon,they are quiet hard to beat.In Jungle shrine there is a place called Catacoom. At the top of Catacoom Zanbamon will be there.He will battle you.