Feeding a Pinata certain fruits or vegetables can change their color or evolve them into a new Pinata. Some examples are as follows.

Flutterscotch (Blue): Feed a White Flutterscotch a Bluebell Flowerhead.
Flutterscotch (Green): Feed a White Flutterscotch a Watercress Flowerhead.
Flutterscotch (Orange): Feed a White Flutterscotch a Bird of Paradise Flowerhead.
Flutterscotch (Red): Feed a White Flutterscotch a Poppy Flowerhead.
Flutterscotch (Yellow): Feed a White Flutterscotch a Buttercup Flowerhead.
Hoghurt: Feed a Rashberry a Cheesecake.
Whirlm (Purple): Feed a Whirlm a Turnip.