Lightly grease a 9×13-inch baking dish.
Combine the graham cracker crumbs and melted butter until evenly moistened.
Press the mixture firmly into the bottom of the prepared pan.
Refrigerate while preparing the filling.
Beat the cream cheese and sugar until smooth and fluffy, about 3 minutes.
Fold in 8 ounces of whipped topping until fully combined.
Spread the cream cheese mixture evenly over the chilled crust.
Arrange the banana slices in a single layer over the filling.
Evenly spread the drained crushed pineapple over the bananas.
Add a layer of sliced strawberries.
Spread the remaining whipped topping evenly over the fruit.
Sprinkle with chopped walnuts.
Drizzle generously with chocolate syrup.
Garnish with maraschino cherries.
Refrigerate the No Bake Banana Split Dessert for at least 4 hours or overnight before serving.