kryptonite in his chest only temporarily removes a Kryptonian's powers. [33]  The effect wears off after fifteen seconds. [34] Blue Kryptonite Blue kryptonite is the  Bizarro  analogue to green kryptonite. Using Bizarro logic, this, in general, hurts Bizarros while having beneficial effects on ordinary Kryptonians. Pre-Crisis, blue kryptonite is the result