This came to light at the end of 2018 but I just discovered it now and couldn't find a thread on here about it. How cool! My biggest gripe with playing older games is not being able to access events and Mythical Pokemon. Have any of you heard about this and gotten it to work? I'm going to try it on Soul Silver and Black version soon. I pray that the DNS server stays up for years to come since it adds so much replay value to these games. You can trade through the GTS too. This is an amazing discovery. Wish I found out about it sooner.
I know from experience the Gen 5 one works, however it seems like depending on where you live you only get certain mystery events. Gen 4 doesn't work at all unless you have an old router with a WEP key. Which unless you haven't updated your router in the last 10 years, you're going to have a bad time.
i never messed around with wifi in gen IV as i didn't have the proper connection back then. gen V on the other hand, i had a field day with it. if i'm not mistaken, i used glitches with the DNS servers to get genesect, meloetta, keldeo, and...accidentally got a shiny porygon-z through it once which hey, i'm not mad about. idk how i did that or RNG abuse back then bc i'm not good at like. stuff. ya know. so i probably won't mess around with this, but this is great news for anyone still looking for that experience.
This works very easily with Gen V games, worked for me no problem on White 2.
There's a workaround for Gen IV games if you have a newer router. Essentially you hotspot your phone, share that connection with a laptop, then connect to laptop with your 3DS. When I shared the connection with my laptop I had to go open connection since the only security was WPA which won't work. Little risky but WEP is garbage anyway.
I got this to work on Pearl and SoulSilver, got Celebi and Shiny Pichu to trigger the events in SS, very cool. I used my Iphone 8 and my Macbook so I'm not sure if it works with any other combinations.
I tried this a month ago, but I had trouble connecting, unfortunately. =/ I'm probably going to try again at the library and try to get mystery gifts from the past that way, since my library's connection is unlocked and not encrypted.
Now this is awesome. It might be old news, but I had no idea about it until just now. Preservation of these events is something that needs more attention. Whether or not they're official or sanctioned through Game Freak/Nintendo doesn't matter. It's the availability and accessibility of them that does. Pokémon is a cultural phenomenon, and there's not much like tons of people crowding up for an event (in person or otherwise) to get their hands on a special or exclusive creature.
I never played the Gen V games, but knowing that I'll be able to access these events should I get to them in the future is a blessing. Props to everyone who made this possible!
For those with a newer router, you can also go into your router settings (type your router's IP address into your browser's search bar) and change your security parameters from WPA to WEP. Though I wouldn't leave at WEP for very long.
Or, if you have a mobile phone, try hotspotting it's data connection. If it lets you choose WEP security or an open connection you should be able to connect to it with your DS. If not, try connecting to it with a laptop/pc that lets you share the connection to make it either WEP or open. This is what I did with my iPhone 8 & Macbook, worked flawlessly.
I might try this later on just for the fun of it. I have all the major event Pokemon from Gen 4 already and even the ones from Gen 5 that I don't have like the Shiny Genesect and Movie 16 Mewtwo are kind of meh. But it'll be cool to have a reason to play my Gen 5 games again.