"Different Dimension", usually abbreviated "D.D.", and called 異次元 (Ijigen) or Ｄ．Ｄ． (Dī Dī) in the Japanese version, is a series of cards that focus on banishing cards, often including themselves once they are defeated, thus sending them to a 'different dimension' as opposed to just destroying the enemy. Although they were released in different sets, a large amount of 'Different Dimension' monsters were released in Structure Deck: The Dark Emperor. Nelson Andrews used some D.D. cards in the ZEXAL anime. This series is related to the Galaxy and Sparrow Family archetype/series.
These cards are not without their weakness however. "Imperial Iron Wall" will effectively shut down nearly all D.D. cards (with the exception of a small few like "Different Dimension Dragon".) Because D.D. is often associated with the Sparrow Family the D.D.'s strongest monsters overall are "D.D. Esper Star Sparrow" with 3000 ATK, and their strongest monster is D.D. Jet Iron, with 4000 ATK. However, these two cards are much more affiliated with the Sparrow Family than D.D. and do not share the D.D.'s usual banishing strategies. Beyond them, however, Different Dimension monsters are rather weak in terms of offense, with no other monsters in their family having ATK higher than 1800. Furthermore, while there are 'Different Dimension' spell and trap cards, the archetype lacks any D.D.-specific support. This lack thereof, combined with a low average ATK, make it difficult to create a Deck with only D.D. cards, which means that D.D. cards are more commonly used as a sub-type (mostly in Banish Decks).