From Bulbapedia, the community-driven Pokémon encyclopedia.
Power Relay is a Theme Deck from the Pokémon Trading Card Game Online. It focuses on - and -type Pokémon and is composed of cards from various expansions in the Black & White Series.
From June 2012 to October 2, 2013, this deck could be obtained multiple times by using one of these redemption codes in the in-game shop: "boundariescrossed", "plasmastorm", "plasmafreeze" and "plasmablast". It is no longer obtainable. Unlike most Theme Decks, it cannot be used in the Trainer Challenge.
These redemption codes were then repurposed to unlock the Rallying Cry online exclusive deck instead up to October 29, 2019.