Those are on a scale of 1-20--unlike you guys, Brock's stats are fixed, meaning he will not level and gain stats like you guys.

Your stats will be able to go beyond 20 as you level.

Brock's stats, for your reference:

Strength: 33
Intelligence: 35
Wisdom: 36
Agility: 40
Resolve: 40
Luck: 40

@Trainer17: Starting stats can be no higher than 20, Brock is fairly powerful, so his stats go beyond 20.

Max stats are 200

If your rerolls come out badly, you keep the best attempt.