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Okay so... this is maybe going to be one of the most niche topics I'll ever make a thread about, lmao One of the things I love about Tamagotchis is its deep history of mysteries and obscure knowledge. For those aware of the vast number of shell designs boasted by each of the earlier...

It's been a while since I gave an update, and I don't really have all that much to add. It seems like there's not really that many versions left to document, so I'm pretty chuffed that we've managed to make it this far and discover this much. ROM versions are an interesting piece of history...

New update: I've begun dissecting V4 item passwords, too, and they seem to work in a similar (though slightly different) way to V3 item passwords. Whilst looking for some I found the output of D-Best's password generator that someone had used, and the password list output by Tamatown at the end...

It should be noted that sometimes different versions have the same secret screens - for example there are two different versions of the P's which have the same secret screen. If two secret screens are different then they're definitely different versions, but if they're the same then they could...

Judging by the packaging you've got a wave 1 shell design. I've heard there were relatively frequent issues with the battery on early releases of the first wave (not sure if it's a hardware issue or a software issue), and its age might contribute to some of those issues, too. Hopefully the...

Since I've had some success with the V3 passwords, I figured I might as well take on a new task: V4 login passwords. In some ways this would be easier than the V3 item passwords to decode - I can generate as many as I want, just like parent and grandparent passwords. However, this time I've got...

Ahh, so presumably you just receive them as you would with a souvenir and it presents the garbage data it's received as though it's a souvenir but there's no menu option for it or anything. Interesting!

Oh wow. I had speculated that Passwords might be able to be used to obtain unused items or unoccupied item IDs, but my personal testing had led to finding no such working passwords. I'm honestly kind of surprised that these "items" do exist, after all! Can any of them be bought or used?

It turns out that parent and grandparent passwords are calculated in a similar way to item passwords! Essentially, there's four components to a parent / grandparent password: U, the username; C, a constant; D, the data; and S, an optional constant. Let's go over each one. I'm on mobile, so...

I'm wondering if the reason some of the passwords aren't working is to do with the Y at the end of the username? This puts a 1 at the start of the username constant which I'm not sure how to deal with yet - it could be having adverse effects on the rest of the password. The ticket passwords are...

Although it can be difficult for a human to get their head around, the operations used in decoding a password are actually really simple for a computer written in an assembly language (like the one Tamagotchis are written in) to perform. In some senses it's kind of the simplest way they could do...

Interesting! Either I've forgotten to add a BIN2DEC somewhere in the generator or there's something I've totally not accounted for.

Huh. And Byte_5 was 0 when you changed Byte_4? That's interesting because it potentially shows some addition a structure I wasn't aware of.

d_item_user can be anywhere from 0 to 255 unfortunately. It's a lot of trial and error at the moment, and I've still not been successful in finding any semblance of a pattern in these numbers.

Unfortunately due to the nature of the generators in that topic, they stopped working when the Tamatown servers went down in 2013, and there's no way to fix them. Until someone creates a working generator, it's impossible to generate new passwords for the V3 (give me a couple weeks and maybe...

Hopefully these will answer your queries: How did you figure out where the letters are stored by connecting japanese and english devices? Maybe I didn't explain well enough in the previous post - basically, I worked under the assumption that the index that's used matches the order the...

I've made sufficient progress that I think it's time for an update - let's once more go over how the passwords are generated. Passwords can be thought of as a five-byte number. Using zero as an example we have: 00000000 00000000 00000000 00000000 00000000 Each byte does something different...

As far as I know debug mode doesn't really provide any additional tools for checking the password system. You'd think this would be a pretty important thing to debug though! Right now I've hit a bit of a wall in the research - I've figured out a few more bits of information that narrow down...

Previously I mentioned that I don't think we're close to cracking anything. Less than a day later... I've changed my mind :) I'm still playing around with things, but I've noticed some really solid patterns beginning to emerge. Let's establish some variables to begin with: we begin with a...

So after some fiddling around with passwords I've decided... it's time for another update. After looking over the old password generators and the information that was sent to the servers using the .cgi file upon login, I noticed that the login password, which is seen on the device in the form...