Cobblemon Delta Server Hosting

Start at 5 GB. That covers about six trainers on Fabric 1.21.1 with the full 58-mod list. The number to watch is wild Pokemon entities rather than mods: if your group spreads across many biomes at once, give it another gigabyte and confirm the change with a spark profile.

The pack is sized for roughly six trainers sharing one world, which is where 5 GB sits comfortably. More can join, but each extra player carries their own spawn radius of wild Pokemon, so load grows with how many people are out exploring rather than how many are idling at spawn.

Stop the server and back up the full world folder first, since parties, PC boxes and Pokedex progress live in the save. Then pick the new build in the Modpacks tab. Every player has to move their client to the same version, because a mismatched Cobblemon version blocks the join.

Yes. Upload Fabric mods built for 1.21.1 into the mods folder over SFTP or the file manager. Anything that adds content, such as new items or Pokemon features, must go into every player's client too, while purely server-side tools do not. Pulling one of the pack's performance mods rarely breaks a world, but back up first anyway.

The official pack from the Cobblemon team stays close to the bare mod. Delta keeps the same Pokemon core but surrounds it with a wider set of quality-of-life and performance mods picked by ItsJustChris, so it feels more polished while staying light. Worlds do not move between the two without matching mod lists.

Those headline features are advertised for the server listed on the pack page. Your rented copy runs the pack's own mod list, so check the build you installed before promising them to players. If they are missing, they would come from extra server-side content that you add and test on a backup first.