Gather all ingredients on the counter.

In a large pitcher, combine the pineapple juice, orange juice, and fresh lime juice.

Pour in the dark rum and mix well with the juices.

Slowly add the grenadine, allowing it to settle at the bottom for a gradient effect.

Add ice cubes to the pitcher or refrigerate for a few minutes to chill the mixture.

Using swizzle sticks or a whisk, gently stir the mixture to incorporate flavors without disturbing the layers.

Fill glasses with ice and pour the cocktail over the ice.

Add fresh fruit slices on top for garnish and serve immediately.