I think Baddies or Pyrats. I would assume Thallen would tackle those eggs first so I don't think it's via diving (it might be, but I think Thallen would go for the Baddy eggs first so it's likely that's where he got it from). I don't think it would be from the grass, digging or via spawn so idk. For all I know Thallen already got all of the diving eggs (not that I wouldn't count on it)