The 2025 edition also continued to use the twenty-one-team format, splitting the teams into three pools of seven.
Based on results from the 2023 and 2024 events, certain provinces earned two berths to the championship.
On the boy's side, seven provinces earned a second birth; Alberta, Manitoba, New Brunswick, Newfoundland and Labrador, Nova Scotia, Quebec and Saskatchewan earned a second spot.
There were eight provinces who received a second berth in the girl's event as Yukon did not send a team.
Therefore, Alberta, British Columbia, Newfoundland and Labrador, Manitoba, Nova Scotia, Ontario, Quebec, and Saskatchewan got a second team.