About This File
Ahiru's Wonderland is apparently an infamous site that hoards event Pokemon from Japan, back in Gen 3 days.
Relevant screenshots of the page will match the relevant save data uploaded.
Jan 1, 2019 edit: @shadowofdarkness shared some files he downloaded, probably back in 2007.
Interestingly, it went beyond Gen 3, and contained various Gen 4 files.
Do note that:
1. .stk files are a bulk batch of files used with pokestock
2. There appears to be some fakes in the saves, use at your own risk.
What's New in Version 1.0.2 See changelog
Fixed: In the Palcity folder of the 2007 package, Osaka-2 has a .NDS file, that apparently was actually a .SAV file.