Prince Rutherford

Prince Rutherford is the current Prince of Yakyakistan.

Befriending Ponies
By the time Prince Rutherford first met the Mane Six, the Yaks and Ponies had been out of contact for "hundreds of moons" due to Yakyakistan's isolated location. However, Rutherford accepted an invitation to visit Ponyville, apparently hoping-as did -that their visit would lead to a bond of friendship between their peoples. However, Twilight and her friends made the mistake of trying to make things just like Yakyakistan, without actually having anything from Yakyakistan. This led Rutherford and his yak aides to smash the various offerings in anger. Later, they were moved by a piano recital put on by, until they learned that he had been using a player piano.

After destroying it, Rutherford demanded that the ponies hold the party they had been promising the yaks; when Twilight attempted to stall due to the absence of, Rutherford was further angered. He promptly declared war on Equestria, and left to gather his people for an assault on the Ponies. Fortunately, a flock of Sheep prevented the Friendship Express from leaving, and Pinkie Pie returned and was struck with inspiration. She realized that the Yaks were angry because the Ponies had tried to imitate things from their homeland, when really they should have been sharing the things that made Equestria great with the Yaks. Greatly pleased, Rutherford rescinded his declaration of war, and responded to Pinkie Pie's exuberant embrace with one of his own.

Some time later, after considerable hinting from Pinkie, Rutherford invited her to visit Yakyakistan for their Yickslurbertfest holiday. Rutherford did his best to make Pinkie Pie feel welcome, joking with her and showing her various aspects of Yak culture. However, after Yakyakistan was buried in an avalanche, he refused to send word to Equestria asking for help, despite Pinkie's attempts to convince him otherwise. Eventually, she went and recruited her friends to help the Yaks, intending to hide their involvement from him, but was discovered. Fortunately, Rutherford was pleased, as Pinkie had unwittingly done as he had hoped: brought help without making the Yaks as for it. As a result, he thanked her and presented her with a Yak helmet and the title of "Honorary Yak."

International relations
Subsequently, Rutherford came to Twilight's School of Friendship in Ponyville, bringing Yona with him to enroll her as a student. After Chancellor Neighsay displayed his paranoia of non-pony creatures, however, an offended Rutherford was among the representatives of other creatures who withdrew their students from the school. When Pinkie Pie attempted to convince her to let Yona reenroll, Rutherford informed her that Yona had disappeared, and threatened war with the other creatures out of suspicion that they were hiding her. Fortunately, the students were found, and Celestia and Twilight prevented Rutherford and his counterparts from attacking Neighsay when he once again spoke again non-ponies; Rutherford subsequently departed the school in peace.

Pinkie later visited Rutherford during Snilldar Fest, which took place at the same time as the Ponies' Hearth's Warming festivities. She sought his help in finding the perfect gift for one of her friends, but Rutherford took her aside and admitted that Yaks were not the best at giving gifts. He then entrusted her with a map to the Gift Givers Grove, a secret handed down from Yak Prince to Yak Prince. After Pinkie Pie's return, he resumed Snilldar Fest activities with his fellow Yaks.