[ASM & Hex] Item that Prevents Capture

[Smileycorp]

Would it be possible to make an item that a wild pokemon could hold to stop it from being captured?

The item would also have to not be affected by things like Knock off and theif, in a similar way to mega stones in gen 6.

 

[ghoulslash]

Would it be possible to make an item that a wild pokemon could hold to stop it from being captured?

The item would also have to not be affected by things like Knock off and theif, in a similar way to mega stones in gen 6.

You could do this by modifying the catch rate calculation, inserting a routine that sets the catch rate to 0 if the target has this hold item (the most conventional method of doing this is through the held effect ID rather than the item ID)

Knock off would require adding the item to an exception list inside of the knock off routine. Check out this post for creating a new knock-off ban list.