For those who got banned here and don't wanna start from C- with no weapons, I forced my account to give me the save bonus back on Splatoon 3 release day
For this method to work, you'll need another account with save data (preferably your main)
Essentially what you're doing is copying your main's s2 save onto the alt.
1. On the alt account complete the S2 tutorial
2. Close the game and open Checkpoint
3. Backup your main's Splatoon 2 save if you don't already have it, and restore it onto the alt account
4. Open Splatoon 3 on the alt account and you should be presented with the save bonus (I forgot if you have to do tutorial first or not but you'll receive it)
5. Delete the alt's Splatoon 2 save (if you don't, you'll immediately get (splatoon 2 console?) banned if you open Splatoon 2 on your alt account as you basically changed everything about your alt's save.)
If you don't have a save on your main or never owned Splatoon 2, well I'm sure there are saves floating around online that will also work.
For this method to work, you'll need another account with save data (preferably your main)
Essentially what you're doing is copying your main's s2 save onto the alt.
1. On the alt account complete the S2 tutorial
2. Close the game and open Checkpoint
3. Backup your main's Splatoon 2 save if you don't already have it, and restore it onto the alt account
4. Open Splatoon 3 on the alt account and you should be presented with the save bonus (I forgot if you have to do tutorial first or not but you'll receive it)
5. Delete the alt's Splatoon 2 save (if you don't, you'll immediately get (splatoon 2 console?) banned if you open Splatoon 2 on your alt account as you basically changed everything about your alt's save.)
If you don't have a save on your main or never owned Splatoon 2, well I'm sure there are saves floating around online that will also work.