Chill your glass: Before you start mixing, throw a few ice cubes into your serving glass to chill it while you prepare the cocktail.

Combine the liquors: In a cocktail shaker, add the melon liqueur, coconut rum, and vodka. Give it a quick shake to mix the flavors.

Add pineapple juice: Pour in the pineapple juice and fill the shaker with ice cubes. Shake it again until everything is well-mixed and chilled.

Pour and top off: Remove the ice from your glass and strain the mixed drink into it. Top it off with the lemon-lime soda.

Garnish and serve: Add a lime wedge to the rim of your glass and drop in a maraschino cherry for an extra pop of color and flavor. Serve immediately.