Preheat the oven to 350°F and grease a 9x13 inch baking dish.

Spread the undrained crushed pineapple evenly across the bottom of the dish.

Spread the cherry pie filling over the pineapple.

Layer the sliced bananas on top of the cherries.

Sprinkle the dry cake mix evenly over the fruit layers.

Place the butter squares evenly across the top of the dry cake mix.

Bake for 45 minutes until the top is golden and bubbly.