Team Glacier

Note:The following information is meerly speculation and non-canon in ANY way. This is simply speculation from an unknown source.

Backstory

Team Glacier, a faction headed by the enigmatic Lady Kyra and bent on the conquest of our planet, hails from a world not unlike our own. Team Glacier's Earth, or G-Earth as it has been coined by the researchers of S.V.R.I. has been thought to be of an alternate timeline all together. The history of G-Earth was seemingly identical to that of ours up until the Ghetsis and Team Plasma's second attempt at conquering the Unova Region. At the Showdown at the Giant Chasm, Team Plasma, using the power of Black Kyurem, defeated their opposition and started a chain of events that would forever shape the planet.

Following their victory at the Giant Chasm, Ghetsis turned his focus on consolidating Team Plasma's power by approaching members of Ex-Team Plasma, and offered them an ultimatum: return, or be destroyed. Most former members were more than willing to rejoin with Team Plasma's major opposition beaten. Others returned out of fear of Ghetsis' merciless wrath. With their ranks effectively bolstered, Team Plasma accelerated their bid to control Unova starting with an aggressive campaign in the north region. Using Black Kyurem as the tip of the spear, Team Plasma moved to cover the cities of Lacunosa and Icirrus. Having already previously left Opelucid City a frozen waste, Team Plasma had effectively isolated the Unova League from the rest of the region and could take over the remain cities at their leisure.

Using a basic pincer formation with Black Kyurem located in Icirrus City, and the Plasma Frigate as well as the august body of Plasma Forces in Lacunosa City, Ghetsis moved to forcibly relieve trainers of their pokemon in a precision strike that would converge in Nimbasa City. Area authorities, defensive teams, as well as the region's Gym Leaders gathered at Nimbasa for what they expected to be the battle that would decide the fate of Unova. Momentum and advantageous positioning led to a lengthy yet effective victory for Team Plasma as they easily crushed the Nimbasa defensive.

Numerous prisoners were taken following the invasion, famous among them were the gym leaders Skyla, Clay, and Cheren. The rest, who were able to escape the arctic onslaught fell back to Castelia City to regroup as Ghetsis moved to complete his conquest of Unova