I don't mean to sound rude, but perhaps you could post a link in the OP? So that people might be able to discuss what you are talking about, for future reference :P .
I did some research into it, because I had never heard of the creepypasta before. After having read it, I'll admit that it somewhat had shivers fall down my spine. But in my opinion, it was nothing compared to the following; *Note, these are Youtube videos of someone reading the stories*
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Snow on Mount Silver
This one essentially involves a cursed Silver cartridge, in which the player has a battle to the death with the one, the only; Pokemon Master Trainer Red.
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Lavender Town Syndrome
We can all agree that while it has been hype up a bit, Lavender Town's music sent chills down our spines as kids. This story addresses just that, the fictional effects it has on kids.
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Pokemon Lost Silver
This one is completely bogus, as were the top couple. But the way it sends you the Unknown messages, the eerie silence of the game. It gets to you.
So while Pokemon Creepy Black is definitely a spine tingler, I have to say that the ones I linked above were vastly more spooky, in my opinion.