>>40531496"Canonically", the protagonists are 10 years old, and the youngsters look younger than the protagonists but older than the preschooler trainers, so I'm going to say around 8 years old.
However, I always thought the protagonists looked like teenagers, so I'm going to headcanon that the protags are in the 14-18 age range and that the youngsters are in the 10-12 age range.
