Thwarting the 5 Trolls
On Wonder Island, You'll run into 5 trolls, each with only one sense. They are the guards of the island and will kill you if they find out you're a human. Here's how to decieve them.

Nose troll: Show him the skunk flower (From mountain island)

Ears troll: Play the mechanical nightengale (From the pawn shop)

Tongue troll: Feed him the mint (From the Pawn shop)

Hands troll: Show him the rabbit's foot (From the wrecked barge)

Eyes troll: Pour invisible ink on yourself (From the basket outside Pawn Shop)

When the eye troll sees nothing, he'll call the others morons and they'll a ll run away.