In a March 31, 2012 exhibition game versus the United States, Poulin assisted on a goal scored by Laura Fortino in a 1–0 win at the Ottawa Civic Centre. It was the first international goal scored by Fortino. In a game versus Russia at the 2012 IIHF Women's World Championship, Poulin put in a three-point performance (one goal, two assists) in a 14–1 victory. By claiming the gold medal at the 2012 IIHF Women's World Championship, Poulin (along with Catherine Ward) became the sixth and seventh members of the (not yet recognized by the IIHF) Triple Gold Club for Women (having won gold in the Olympic Games, the IIHF World Championships, and the Clarkson Cup). In August 2012, Poulin was named the captain of the Canadian Under-22 team that competed in an exhibition series versus the United States Under-22 squad in Calgary, Alberta.