Preheat oven to 350 degrees.
Coat an 11 x 7 inch baking dish with cooking spray.
Drain pineapple, reserving 3 Tbsp. of the juice.
Chop pineapple to measure 3 cups.
Combine chopped pineapple and juice with peaches and pour into the baking dish.
Stir butter into the cake mix.
Spread batter over the fruit.
Generously spray the top of crumble mix with more cooking spray.
Bake for 40 minutes or until golden and bubbly.
Serve warm with frozen yogurt.