Side Deck

Side Deck
Japanese (ruby)	サイドデッキ
Japanese (romanized)	Saidodekki
English	Side Deck
Other names French: Side Deck German: Side Deck Italian: Side Deck Korean: 사이드 덱 Saideu Dek Portuguese: Deck Auxiliar Spanish: Side Deck Traditional Chinese: 備牌 Bèipái / Bei6 paai4

A Side Deck (Japanese: サイドデッキ Saidodekki) is a collection of between 1 and 15 cards, separate from the Main Deck. In between Duels of a Match, players may exchange cards from their Side Deck with cards in their Main or Extra Deck to better suit a strategy against an opponent's Deck.

Since a Side Deck is not compulsory, a value of 0 for a Side Deck is considered legal. Any value between 0 and 15 inclusive is permissible.