It's too hard to explain in my answer, so just search for it on YouTube. There are tons of mission guides on YouTube.
i beat all the missions on club penguin i will give it to you later but i will answer it.
its a game in club penguin you dumbo
in the cave
daa find herbert andthen you find the crab
you pull the lever!
you have too beat up and blow up the bear and crab
Go back and get the sea weed kind
You can find the scissors in your spy phone in your inventory
you can get it by bying a club penguin stuff animal and you get your coin and you tipe in your code on line and you can get the crab suit
it is on a mission i have forgotten which one but now i have remembered it is Questions For A Crab but Herbert steals your spy phone!
Shoot it
underground