"I've never loved anything or anyone in the way that I loved that dog," the freestyle skier said.
The Tongan flag bearer and cross-country skier stole the show once more.
The action-packed ceremony featured everything from roller-blading pandas to K-pop musicians.
The games in Pyeongchang, South Korea, drew to a colorful close on Sunday.
The IOC said two Russian doping violations during the Pyeongchang Games had marred an otherwise clean report card for the Russian delegation.
She won gold in both the skiing and snowboarding events in Pyeongchang.
A Russian curler had earlier lost his bronze medal over doping charges.
Big jumps, incredible skill, high-flying acrobatics and ever-present danger.
"He is the bright spot on the day."
American Lindsey Vonn missed the podium with a slip and near crash.
The skating duo married in 2016.