Pour Chex into a large bowl and set aside.
In a small bowl, microwave chocolate on high for 30-seconds at a time until melted and smooth when stirred.
Add in 2-3 drops of blue food dye to melted chocolate, stir, and pour over chex mix.
Pour cereal mixture and powdered sugar into a large ziplock bag and shake until fully coated.
Add in sixlets and small candy eyes. (approx 1/2 cup of each)
Serve and enjoy!