​One of the most common questions I see in the Goat Community is "how do I side deck as x deck for y matchup"? More often than not, the answer people will get in response is "it depends", and that isn't because people don't want to help others learn how to side - it's because this is probably one of the most open-ended questions you can ask a Yu-Gi-Oh! player and depends on a variety of factors. These factors include things like how common a bad matchup is, how many cards you can afford to side in/out without making the overall strategy fall apart, and what you expect your local metagame to be.