In a blender combine the pineapple, pineapple syrup, Coco Lopez, and unsweetened creamed coconut. Blend on high until completely smooth. Strain to remove any unwanted pineapple parts into measuring cup with a lip or you can use a medium bowl. Stir in the heavy cream, vanilla extract, and dark rum. At this point you can allow the mango sherbet mixture to steep for a few hours or overnight in the fridge. If not, churn and freeze according to your ice cream maker instructions. Serve with a maraschino cherry on top.