Fill glasses halfway with crushed ice and set aside.
In a pitcher, combine the apple cider, orange juice, pineapple juice, cranberry juice, and lemon juice.
Add grenadine and simple syrup (if using). Stir to mix well.
Pour in ginger ale and sparkling apple cider (or club soda) and stir gently to keep the bubbles.
Taste and adjust sweetness with more syrup or tartness with lemon juice, if needed.
Strain the mocktail while pouring into glasses (optional for smoother texture).
Garnish with pomegranate seeds, blackberries, mint leaves, and an orange slice.
Serve immediately while fizzy and fresh.