The Energy Root (Japanese: ちからのねっこEnergy Root) is a type of medicine introduced in Generation II. It is a type of herbal medicine that restores a Pokémon's HP.
In A Rush of Ninja Wisdom!, Sanpei offered a pill made out of Energy Root to Ash after his Froakie had lost to him in battle. The remedy proved to be instantly effective, although Froakie greatly disliked the bitter taste.