Gustave le Grand

Gustave le Grand is a griffon and a baker that appears in the episode MMMystery on the Friendship Express.

Depiction in the series
Gustave first appears aboard the train, gloating on how his éclairs would win first place, instead of the Cakes' cake.

He is later under suspicion when Pinkie Pie theorizes on that he is the culprit, until Twilight Sparkle proves that Gustav didn't do it, especially after the other bakers' entries are eaten.

It is proven by Twilight Sparkle the culprits responsible for ruining the Cakes' cake is Rainbow Dash, Fluttershy, and Rarity.

Pinkie, having learned not to throw accusations and get the facts, reveals the culprit who ruined the other entires were the bakers themselves! Gustave ate Mulia Mild's Choclate Moose Mousse, Doughtnut Joe ate Gustave's eclairs, and Mulia ate Joe's Doughnutopia.

With no entires to enter into the competition, Pinkie ie comes up with the idea of combining everyone's treats into one, which wins first prize, making them all winners.

Quotes
"Zis is not so, for I, Gustave le Grand, do challenge your crude cake to a duel of delectable delicacies, against my exceptionally exquisite eclairs! They will undoubtedly strike down all the competition, winning first prize and crowing me the champion."

- MMMystery on the Friendship Express