Prep the Base: Preheat your oven to 350°F (175°C). Grease your 9x13-inch baking dish.
Layer the Fruit: Spread the undrained crushed pineapple evenly across the bottom of the dish. Arrange the sliced bananas in a single layer over the pineapple.
Add Cake Mix: Sprinkle the dry cake mix evenly over the fruit. Use your spatula to gently smooth it out if necessary.
Top with Extras: Sprinkle the chocolate chips, maraschino cherries, and chopped nuts over the top of the cake mix.
Drizzle Butter: Slowly and evenly drizzle the melted butter over the entire surface, ensuring you cover as much of the cake mix as possible.
Bake: Bake for 45–55 minutes, or until the top is golden brown and the fruit juices are bubbling up around the sides.
Serve: Let it cool for 15 minutes before serving with a generous scoop of vanilla ice cream.