Just made a LOT of tile changes to Snowce City. I took snow off a roof and created a new grounded snow tile to prevent weird transitions behind buildings, fixed some Gym tile bugs, and respecified the pier roof edge (and corner edge) to hide behind them south of the Pokémon Center, among other things. Busy day of fixing, little of playing. I'll post the file and PM you a private link sometime (unless you can tell me how to IPS it), or I can e-mail it if you want to PM me that (unless it's in your profile).
Note I'm not done playing Zhery yet (seven Badges now), but you can test out if I missed anything should you feel so inclined. ;) We can even post this fixed version, which INCLUDES FROSLASS. :D (I might move her to the middle chamber of Icestorm, however, or a frozen area in Lauren if any exists; Mt. Winter isn't all about frozen Pokémon, it seems.)