Combine crumbs and butter, stirring with a fork until moist. Press crumb mixture into bottom and 1/2 inch up sides of a 10-inch springform pan. Spread 1/2 cup chocolate syrup evenly over crust; top with banana. Spread the ice cream evenly over banana. Cover and freeze 3 hours or until firm.
Spread the strawberry sundae topping evenly over ice cream. Cover and freeze 1 hour.
Let stand at room temperature 5 minutes. Cut into 16 wedges. Drizzle each serving with about 3/4 teaspoon chocolate sundae syrup, and top each with 1 tablespoon chopped pineapple, about 1 teaspoon chopped peanuts, and 1 maraschino cherry, if desired. Serve immediately.