The Training Camp and Dojos are services unlocked through requests that allow you to level up your characters and learn new combos. At the Training Camp, you can spend rupees to instantly level up any character, which is incredibly useful for bringing new characters up to speed or boosting a struggling warrior. The cost increases with higher levels, so use it strategically.
Dojos, on the other hand, allow you to spend rupees and materials to unlock new combo attacks for your characters. These new combos often provide more damage, better crowd control, or unique effects. Regularly check the Dojos for available upgrades, as new combos can significantly enhance a character's effectiveness in battle. Investing in training and new combos is crucial for tackling harder missions.