The U12 Juveniles Championship has been reorganized by the Swiss Baseball and Softball Federation. In 2025, there will be two divisions within the U12 age group: the Competitive League and the Development League. Both divisions are divided into an Eastern and a Western group, with teams competing across regional borders as well.

The Challengers begin their season on Saturday, April 12, in Bulle, Fribourg. There they will face the Geneva Dragons at 10:00 a.m. before playing the Rümlang Kobras at 12:30 p.m.