Ahead of the Pokemon Omega Ruby and Alpha Sapphire commercial release, Pokemon X and Y is giving away free Shiny Gengar via GameStop across the United States from Oct. 13 until Oct. 26.

Shiny Gengar is a dark purple bi-pedal Pokemon that evolves from Haunter to Gastly when traded.

With the aid of Gengarite, it can Mega Evolve into Mega Gengar.

"As Mega Gengar, a portion of its body sinks into the ground. The lower portions turn a more reddish purple, and a third eye appears on its forehead. This new unblinking eye is oval and yellow and allows it to see into other dimensions," according to Bulbapedia.

"Gengar is very mischievous, and at times, malicious. It enjoys playing practical jokes and casting curses, such as pretending to be one's shadow, then behaving erratically. When the quarry notices, the Gengar takes delight in its victim's terror. However, Gengar has been known to be loyal to a Trainer who treats it well," the description added.

The free Shiny Gengar promo is not only intended to drum up interest in the upcoming Pokemon Omega Ruby and Alpha Sapphire title, but also to advertise Pokemon's trading card game.

Nintendo has struggled to keep up with its toughest competition, PS4 and Xbox One, for quite a while now.

Factors include lackluster titles and next-gen development that appeals to the young eclectic generation.

Wall Street Journal reported that while Wii U sales tripled in the second quarter of the year, its operating loss doubled.

August numbers were so much better, thanks to Mario Kart 8 release.

Pokemon Omega Ruby and Alpha Sapphire is coming to Nintendo 3DS on Nov. 21.