When I generate a Infinite/default world all the caves are full of water is there any chance I can fix that?
since when are there caves in PocketMine anyway? there are no cave populators here: https://github.com/pmmp/PocketMine-MP/tree/master/src/pocketmine/level/generator/populator
How does one fix something that doesn't exist? The only way this issue could be happening in the first place is if you are using a plugin or you are using a spoon. Either way, we can't help.
Well a person can make one... You don't always base it on how what's only created you use your mind/ability to I'm provise....