As far as giant snakes go, Mango is quick to make friends, and Pinkie Pie of course is no stranger to friendliness. Unfortunately for her, Mango also has a bad habit of devouring his friends accidentally (he just gets overexcited, that's all). Thankfully Fluttershy was there to keep him under control.
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Kokkinos
Aww he is just being friendly. :3