Hi, first post here!
Funny how my GB Operator just arrived today, as it seems it is now precisely 25 years ago when the Tennispalatsi Mew event was held here in Finland. Anyhow, to cut a long story short, here is my Mew from my old Red cartridge. The battery has, impressizely enough, survived for 25 years. I will head to have it changed on saturday now that I managed to back up my save. I found this site when researching these event Pokémon, so I suppose it's appropriate to share it here today.
This save is exactly how I left the game somewhere around 2001 or so, Bill's PC should still contain the Pokémon I attended the Finnish Championship qualifiers in 2000 or something with, such as Dugtrio, Double Rester Articuno and Hyper Beam Spam Dragonite etc :DD Back then finnish players used to hang out on the #PKMN IRC-channel in ircnet or something, so the "competitive" players already knew eachother online. Lots of memories of reading the Azure Heights forums and preparing for the event.
Pokemon - Red Version (USA, Europe) (SGB Enhanced).sav