The Descendants of the Beginning

The Descendants of the Beginning is a family, formed entirely of Familtree's descendants and partners, hence the name.

Chi
Chi was the first xerneas, and the only child of Famlitree and Seasonal Rain. Once she was born, Seasonal Rain soon realized that Famlitree wasn't of his kind, and chooed her and the baby out of the house. Famlitree wanted to rush right back to expanding her family tree, so she left Chi in a crystal cave, where she was rose by rock and ground type pokemon.

However, this event scarred Chi for life, and led to Chi becoming very aggressive with the current yveltal, Psi, and the current zygarde, Omega, and later led to the War of Chi, Psi and Omega, a war in mainly the pokemon multiverse that scarred the entire triverse eternally.

Lovekit
While Lovekit never threatened the multiverse, she was certainly a threat. She was stillborn, meaning she died only a few minutes after her birth. When she went to Starclan, however, she couldn't accept her fate, and thus started killing off the rest of Freezingwillow's family. She led Dropletfrost to freeze to death in the cold, Crackedice to burn himself alive, Swirlingtail to bleed out, Fireshot to be carried off by a heart, and tried to convince Freezingwillow to commit suicide, though she failed at this.

(W.I.P.)

Trivia

 * While all of Famlitree's children are demi-gods, strangely enough, only Chi has shown godlike powers.