The gunk part 8

I am here with the next part of the Gunk and well, now we are getting into the end game. We get saved by out friend and well, we go straight back into the boss's tower to defeat the big bad boss but how will we defeat the boss, we will have to work that one out before the final part right, it should be easy right.........right. ... https://www.youtube.com/watch?v=rCBNhEU8GLo