1Heat oven to 350°F. Grease bottom only of 9-inch square pan with shortening or cooking spray. Make and bake brownies as directed on box for 9-inch pan, using water, oil and eggs. Cool completely.
2Line cookie sheet with waxed paper. Using cookie scoop, scoop brownies into 36 (1 1/2-inch) balls. Roll between hands to smooth edges; place on cookie sheet. Refrigerate to keep chilled.
3Line a second cookie sheet with waxed paper. In medium microwavable bowl, microwave candy coating uncovered on Medium (50%) 1 minute, then in 15-second intervals until melted; stir until smooth. Remove several brownie balls at a time from refrigerator. Dip tip of lollipop stick about 1/2 inch into melted coating and insert stick straight into brownie ball no more than halfway. Dip brownie pop into melted coating to cover, letting excess drip off; place on cookie sheet. Immediately adhere green gummy candies and press brown candies in center for pupils. Let stand until set. Use food decorating pen to draw veins on eyeball pops.