Twilight's Weight Gain Experiment

After meeting her newly fat and happy brother, Twilight sets out to determine just what it is about being obese that's seen as being so enjoyable.

Meeting Shining Armour and seeing how fat he's become has perplexed Twilight. Even more perplexing is how he can find it enjoyable. How can this be? Well, Twilight intends to find out, through the power of science!

Contains: Fat ponies, weight gain, overeating.