Juice fresh lemons until you have about one cup of lemon juice, removing seeds for a smoother drink
In a pitcher, combine pineapple juice and lemon juice, stirring well
In a separate cup, dissolve sugar in a small amount of warm water to create a simple syrup
Pour the syrup into the pitcher and mix until fully combined
Add cold water gradually, tasting as you go to reach your preferred sweetness and strength
Stir in lemon-lime soda if you want a fizzy version
Add ice cubes directly into the pitcher or individual glasses
Toss in pineapple chunks and lemon slices for extra flavor and presentation
Chill in the refrigerator for at least 30 minutes before serving
Stir before serving to ensure even flavor distribution