From September 22nd, 2017 until October 16th, 2017, participating Apita Piago, AEON, AEON Supercenters, AEON STYLE, AEON Retail Stores, Ito-Yokado, EDION, Geo, Joshin Denki, TSUTAYA, Tay Two, Toys "R" Us, Nojima, Bic Camera, Kojima, Sofmap, Fuji, Futaba Tosho, Heiwado, Yamada Denki, Yodobashi Camera, WonderGOO, Pokémon Stores, Pokémon Centers and 7-Elevens in Japan will be distributing an Alternate-Colored Silvady to players of Pocket Monsters Sun or Moon via a serial code as part of the Alternate-Colored Silvady Campaign (煌めきのシルヴァディキャンペーン). Codes can be redeemed from September 22nd, 2017 until November 16th, 2017.

Alternate-Colored Silvady Details

Pokémon	Info
	Level: 100
	OT: エーテル Aether
	Type: Normal
	Ability: RKS System (ＡＲシステム)
	Held Item: Gold Bottle Cap
	Moves: Multi-Attack, Parting Shot, Punishment and Scary Face

Source: http://www.pokemon.co.jp/sp/silvady_2017/

Korean Alternate-Colored Silvady Distribution

Those that pre-order a copy of Pocket Monsters Ultra Sun or Ultra Moon or the Pocket Monsters Ultra Sun / Ultra Moon Double Pack in Korea through an official distributor of Nintendo Korea from Saturday, October 14th, 2017 until Wednesday, November 15th, 2017 can also get a serial code for this Silvady which is identical to the data above except for the OT which is 에테르 Aether. Codes can be redeemed from October 14th, 2017 until November 30th, 2017.

Source: http://pokemonkorea.co.kr/ultrasun_moon/menu6/14

Chinese Alternate-Colored Silvady Distribution

From September 22nd, 2017 until November 16th, 2017, participating retailers in Taiwan and Hong Kong will be giving out serial codes for this Alternate-Colored Silvady that work with the Chinese and Japanese versions of Pocket Monsters Sun or Moon. Silvady is identical to the data above except for the OT which is just Aether. Codes can be redeemed from September 22nd, 2017 until December 16th, 2017.

Source: http://www.pokemon-sunmoon-cn.com/usum/sc/campaign_170914_02.html

Alternate-Colored Silvady GX GET Campaign - TCG Promo Pack

From Friday, September 15th, 2017 until supplies last, those that purchase 5 or more booster packs from participating stores across Japan can receive the Alternate-Colored Silvady GX GET Campaign (煌めきのシルヴァディGX GETキャンペーン) promo pack. The pack includes 13 cards, 9 energy and 4 Pokémon cards.


Details of the 4 promo Pokémon cards: Sneasel 119/SM-P, Type： Null 120/SM-P, Silvally 121/SM-P and Silvally GX 122/SM-P have been added to our TCG Dex.


Source: http://www.pokemon-card.com/info/2017/20170911_000900.html

Alternate-Colored Silvady in Pokémon Ga-Olé - Dash Set 2

When playing the Pokémon Ga-Olé - Dash Set 2 course Friends in the Alola Region Course (アローラちほうのなかまたちコース), an Alternate-colored Silvady has a rare chance of appearing. If you battle and catch it, you'll get a special disk. Details of the special promo disk have been added to our Pokémon Ga-Olé Promo Disks page.

Source: https://pokemongaole.com/new/d2/index.html#p08