Did you even try go to another computer or make a new Windows operation system and try to install Steam and Sonic Adventure 2 game and you realize that you don't have any Save File at all?

Probably because you did uncheck Enable Analytics on tab Statistics when you starting the game. (Even if you leave it that button that is Enable even that didn't work properly).

Probably you did lost all your Chao Garden. :(

Still is a hope, if you have on your computer still those SAVE files, but you have might still a CHANCE, to get back.
(if you format all, then i'm sorry to hear that) :(

Here is the save files what are you looking for.

WINDOWS XP:
C:\Program Files\Steam\steamapps\common\Sonic Adventure 2\resource\gd_PC

WINDOWS 7:
C:\Program Files (x86)\Steam\SteamApps\common\Sonic Adventure 2\resource\gd_PC

COPY SAVEDATA file and put it somewhere safe.

Then PASTE it on another Windows system on the same way like it's shows where is on the SAVE files.

--------------------------------------------------------
2 Save Files are:

• SONIC2B__S01 (Story Mode, Emblems, Unlock Characters...)
  
• SONIC2B__ALF (Chao Garden, Chao Karate...)

_____________________________________
If somebody lost it... I feel sad for you, bro. :(

But there is a way..

You can have mine SAVE DATA (probably that's cheating or Spoiler, but that doesn't matter).

It has 100% Save File. (+ Battle DLC)

Everything Unlock 180 Emblems, Story Mode, Menu Screen Theme and.... my own Chao Garden (Chao Race, Battle).
(Please be care good for my Chao or at least you can make your own good one)


Here is the link: (Sorry, Steam doesn't let me. Except you can look on my Youtube video in the Descriptions)
(RORYUkEr1) - Download Links - Chao Garden & Mods [Save files, Skins, Programs] (PVMEdit) PC ONLYSA2B_Chao_Garden_SaveFile


Have Fun with your own Chao Garden. :)



NOTE: Sorry for bad english and I was first time made this guide