How much does switching out affect the moves' accuracy, and which moves reliably hit Pokemon switching in?

I run Pokemon with moves that have a base accuracy of 100% on opposing Pokemon, and I find that they have a tendency to miss frequently against Pokemon switching in, so I want to know by how much accuracy is reduced against Pokemon switching in, and which moves do not have their accuracy reduced against Pokemon switching in.

Pleaselog inorregisterto add a comment.

Switching Pokemon has never (with one possible exception) affected the accuracy of moves. The list of modifiers can be seen in the table below, up-to-date since Generation V. Note that switching out isn’t recorded anywhere.

Accuracy (Bulbapedia)

To my knowledge, only one move’s accuracy is affected by switching: Pursuit. Since Generation II, Pursuit doesn’t perform accuracy checks if used on a target that’s switching out on that turn.

Pursuit (Bulbapedia)

There are a few possible explanations:1. The Pokemon switching in has an ability that raises evasion, such as Sand Veil, or was holding an item that lowers accuracy, such as Bright Powder. Amethyst’s answer has a complete table of all possible modifiers.2. Your Pokemon’s accuracy was lowered, which may cause 100% accurate moves to miss3. You mistook a movefailingor havingno effectfor missing. For example, using Spore on a burnt opponent or using Sucker Punch against a Pokemon switching in would fail, while using a psychic-type move on a disguised Zoroark would show up as having no effect.4. You were in a double battle and targeted the wrong spot.5. You were in a double battle and the move was redirected via a move like Rage Powder or Follow Me.6. You mistook 100 Power for 100 Accuracy.

If you want a better answer, please tell us what move you were using and against whom.