I'm going to test Oceanville again when I get home, but I don't have my hopes high.
I've double checked and made sure that the collisions, camera, blastzones, and STPM are all exactly the same as default 3.02 Smashville, but I still occasionally get a desync online with certain players. I don't quite know 100% how or why this happens, but I have a feeling it has something to do with the 3.0 -> 3.01 update that changed some stages around; some people still have the old stages from 3.0, while other people have the newer ones from 3.01 and 3.02 that have updated models, cameras, blastzones, collisions, STPM's, and the tri-stripping fixes to high poly stages like FD and Dracula's Castle.
This stage freezes consistently.
I have a feeling it's because of the stadium model. When the creator gave it to me so I could fix the lighting to make it look more natural and dynamic, I noticed that most of the unneeded background was removed, but parts of them were left behind, such as the buildings and part of the sky. I didn't think it would do anything bad so I never touched it, but now that I know I'll let the creator know and see if he can fix it, or I'll fix it myself, I think I still have the PAC lying around on my desktop somewhere.