They can be summoned by putting in the Y Medal of the Yo-kai Hero when their respective Onryo are around. The YSP Watch is turned anti-clockwise while the summoning jingle plays and transforms the bearer into the hero itself, giving them strength to fight enemies.
Each Yo-kai Hero has a specific power that can be altered by putting in different kinds of Command Y Medals, giving the hero a unique ability.
List of Yo-kai Heroes
|Yo-kai Heroes (Japanese: 妖怪HERO (ヒーロー) Yōkai Hīrō)||Appearance||Watcher||Onryo||Y Medal|