How do you get the Pokemon Darkeye in Pokemon Diamond?

Answer 1

There's no Pokemon called Darkeye. I'm assuming you either mean the legendary Pokemon Darkrai or Sableye.

Darkrai requires the Member Card to get to. The Member Card was issued over Wi-Fi late last year and is no longer available as far as I'm aware. However, if you're playing Diamond, there is still a way to be able to get to Darkrai. In the games if you rapidly change directions along load lines while going full speed on a bike you can override the Nintendo DS's memory in a way that lets you get to places that would otherwise be unavailable. It's called Tweaking or Holepunching. There is a certain art to it, though, so I'd suggest going onto YouTube and searching for how to get Darkrai using tweaking. There are many good guides for performing the tweaks and travelling safely to Darkrai. Please don't try to tweak without a guide, as it can pose risks to your game if you do it incorrectly!

That said, good luck getting Darkrai, if you choose to. :)

Just incase you meant Sableye, however: Sableye isn't normally obtainable in Pokemon Diamond but if you have Pokemon Sapphire inserted into your GBA slot on the bottom of your DS you can find it in Iron Island. Otherwise, I'm afraid you'll have to get it from a Sapphire or Emerald cartridge using Pal Park.

Hope this helps!