Nose For Treasure, or simply Smell, is a recurring ability/spell in the franchise. It checks the amount of remaining treasure in the current dungeon floor.
In the remakes, Torneko learns this at level 9.
Nose for Treasure is learned by advancing to rank 7 of the Thief vocation.
Yangus can cast Nose For Treasure after allocating 16 skill points into his "Humanity" skill.
This ability is learned with 42 skill points invested into Acquisitiveness skill.
Unfortunately, it only checks the remaining red chests, not blue ones, severely limiting its usefulness.