I don't know if anyone is still interested in this game, but if they are, as a little tribute to the Cutlerine, I went ahead and made a small update to the game which I titled "Zeta" as the cornerstone of the update is that all the zombie pokemon are now available in the wild with front, back, and party sprites, updated stats, and even types, abilities and movesets for some. Further changes include a few more zombies and a few trainer teams having been changed.
New Zombies:
Zombizard (replaces Dragon); Meteor now uses Dragoone instead
Pikachew (non evolving)
Mewcas
Mewtation
Murderow (renamed Dirtkrow, evolves into Liver at Lv. 33)
Liver (just renamed Scar Lugia)
Krampus (Delibird)
Latinstein (original game's Stiticher)
Stitcher (Pulse + Minum)
Houndecay (Alternative Houndsour evolution)
Houndemon (New Headoom evolution via Firestone)
Virodon (Groudon)
Azombie (Azurill)
Ghastlier
Haunt (evolves at Lv. 40)
Genguts
Rancid
Killia (When Killia evolves, Shinigami joins the party like Shedninja does for Nincada)
Gardevour
Tentorture
Tecthulu
Shaderu's sprite had been changed, on account of me recycling its original sprite for Ghastlier. It is now a grim reaper-esq Jirachi.
Also included:
Purrloin, Liepard
Dwebble, Crustle
Zekrom, Reshiram, Kyreum
Cinderco evolves into Ho-Oh via the Firestone
(Radiorange in in the wild on the Isle of Calm)
Kelceon evolves into either Zekrom or Reshiram dependent on the stone (either Thunder or Fire respectively)
Skarmory evolves into Kyreum
Wild Oozle always hold Water Stones
Wild Rotmander always hold Fire Stones
Wild Boilbasaur always hold Leaf Stones
Wild Pikachew always hold Thunder Stones
Bleedoise is a Water/Steel Type
Gigawolf is just named Zoroark and is an independent pokemon found on Mt.Pyre
Mightyena doesn't evolve, but its stats are rather high and it is a Dark/Steel type
A battle with Horseman Death replaces Temulace in Victory Road
Senex uses Virodon instead of Faceleech for final battle
Mewcas is onboard the S.S. Cangrejo don't forget to catch it!
Virodon is on Blighted Way
Rotting is in Petalburg Woods
Latinstein is on the route with the Weather Station
Cyndaquil is in Solar Cave
Antispiral is an alternative evolution for Zangoose
Kamina is in Victory Road as a wild pokemon
Zigzagoon, Linoone, and Dragoone are all ground type pokemon instead of normal
Everything else had multiple locations or is just not so rare that if your arn't searching for it, you'd miss it.
https://www.mediafire.com/file/z21qy9rx2cj0yul/snakewood-zeta-update.zip/file