One Piece: My Companions Come from the Dungeon

Apart from the name, there are no elements related to dungeons, and there are basically no skills. As for One Piece, it is probably all about the explanations, and the timeline and plot are confusing.

One thousand Baileys, fifteen, one thousand and twenty-five, one hundred and thirty-five, one million and forty-five? Fifty-five million? One hundred and sixty-five million? One billion seventy-five, ten billion eighty-five?