In Grubbins on Ice, how do I win the final battle against Araxia and Big Bones?

Araxia's the only one you can harm, so ignore Big Bones. When Araxia's flying and invulnerable, hitting him will knock him back - this is important. Winning this fight hinges on pushing him into Big Bones' candy stream.

I found this strategy/build that will probably be helpful:

• Attack costume - strongest attack stamp (Skeleton of the Wolf or such).
• Yeti costume - strongest poison stamp.
• Healer costume - Multi-Wing Bat stamp (full party regen).

With the above combo I attacked Araxia. After a few rounds of hitting him he will have candy fed to Big Bones, which will cause him to attack. You need to have the Yeti's shield up to avoid major damage. The damage increases every time Big Bones attacks, so you will be wiped out in a long battle no matter what.

(This strategy goes on to mention a bunch of things that I already said, but you can feel free to read it if you want the full picture :) )