 Like Mega Evolution, Primal Reversion increases the Pokémon's stats and changes their Abilities; unlike Mega Evolution, Primal Reversion can be performed more than once per battle.Bond Phenomenon (キズナ現象 "Bond Phenomenon") is a mechanic that debuted in the anime's "XYZ" series and was introduced into the core series games in "Pokémon Sun" and "Moon".The only Pokémon capable of this transformation is Greninja with the Battle Bond Ability.