go back to travis town and train.when your versing him in neverland pack elixers,and
etheres and the pumpkinhead helps.the counteratakk abilerty helps and so dous splashpot.

Pack elixers and ethers. You can also avoid him by jumping around a lot and letting people
in your party take some of the blows and make some hits. You can try hitting him then
bouncing away too, though that make drag it out a bit too much.

You might be a level or two weak so you could also go and train.

you need potions and to use cure.dont stay close to him he'll slide under you so be on
gaurd

go to all the other worlds that you have beaten then get ally of elixars and potions and
hi potions and stuff like that. then equip it all so it is in your items also keep a
distance while you are trying to use the items.