I downloaded Celadon today and checked it out. Looks alright. I hate to criticize, but I've found a few flaws as of now:
Some buildings that have doors don't lead anywhere. You can just walk up to doors like they're a wall.
It can't be helped, but it's too open here. Too OP for sentries.
Not much of a problem and a pretty good spot, but you can build inside some plants.
Some of the songs are much quieter than the others. For example, the Hoenn Gym Leader Orchestrated theme is considerably quieter than the S.S Aqua Eurobeat Remix song.
Blu team, once again, have a disadvantage. There are deep pools by Blu spawn, where you can place teleporters, and you can place a sentry on the roof of a building nearby spawn.
Though this map has flaws, it's still enjoyable. I'm enjoying looking around and the nostalgia. I'd like to see this on Pokemon Trade or Trade Gaming History if that's OK with @ColdEndeavour . This map is on gamebanana, so I don't see why there should be a problem. pkmn_celadoncity_v1 (Team Fortress 2 > Maps > Trade) - GAMEBANANA