When a new mechanic is added to Pok\u00e9mon Go<\/em>, Niantic actually adds multiple new features to make it work. Primal Reversion is one such mechanic that does that, as it only applies to two species and needs you to collect Primal Energy for it to work at all.<\/p>
First introduced in Pok\u00e9mon<\/em><\/a> Omega Ruby <\/em>and Alpha Sapphire<\/em>, Primal Reversion acts as a transformation for Groudon and Kyogre. Much like Mega Evolution, Primal Pok\u00e9mon take on a new appearance, gain new abilities, and otherwise improve their battle performance. Pok\u00e9mon Go <\/em>keeps that Mega-similarity by requiring you to collect Primal Energy to activate the transformation<\/a>. It also has a similar cost, cooldown, and level system to Mega Evolutions\u2014so keep that in mind when using it.<\/p>