Defeat the indicated Boss with The Super-Secret Canadian Mind-Control Device set to the indicated setting to get the corresponding reward.

Baron Von Ratsworth's money clip	Defeat Baron Von Ratsworth with a setting of "2".
Baron Von Ratsworth's top hat	Defeat Baron Von Ratsworth with a setting of "9".
Boss Bat bling	Defeat the Boss Bat with a setting of "8".
Boss Bat britches	Defeat the Boss Bat with a setting of "4".
Cape of the Goblin King	Defeat The Knob Goblin King with a setting of "7".
Glass Balls of the Goblin King	Defeat The Knob Goblin King with a setting of "3".
Rib of the Bonerdagon	Defeat The Bonerdagon with a setting of "5".
Vertebra of the Bonerdagon	Defeat The Bonerdagon with a setting of "10".