Limit Breaker (限界突破 Genkai Toppa lit. Limit Break) is a Skill in Fire Emblem: Awakening that raises the user's maximum stat caps by 10 when equipped. It is learned by using the Limit Break Manual, which is a DLC-exclusive item.
As with all skills obtained through downloadable content, this cannot be passed on to any children characters from the parents. However, the character can simply use the corresponding item to obtain the skill anyway.