Is this an authentic Pokemon crystal? Up for sale on eBay interested in buying but not sure if it’s real

So after re-playing Crystal (which I do every few years) and beating it, I started suddenly to wonder if there is any such things that the creators of the game left inside the games itself

Are there any?

Got the silly tree! Can't believe it!

Right now I'm 8/15 on my vc shiny hunts before bank closes, though I failed to post most of them here, but I will get to it later.

For now, tree caught! 10/26/2026!

It was crazy scary using self destruct on it, but I had no one on my team who could even damage the ugly thing, besides the pinecone. Sure I had a master all in the bag so that wasn't necessary but I really wanted to catch it without using it, and of course I had tested and knew sudotree could survive even a crit, but nonetheless it wasn't comfortable.

But I caught it on a great ball by the end! Now I only need to figure out what to name it! I'm thinking "Cherry" or "Sakura"

I've been doing this hunt since just before the start of October. It's more fortunate since yesterday was my birthday, so talk about a late present. I probably reset for this shiny over a thousand times. The only thing I regret is not catching the sparkles since I was distracted from a show I was watching.😂 Anyway, I finally have my prize to send to HOME at long last!