Technically, I'd have to say that this can't be missed. When you get this, though, is debatable on whether or not you've dealt with all of the named officers and done as many objectives as you can. Furthermore, you can gain coins through opening the golden treasure chests scattered throughout the levels (though you might also end up getting Beli from them). To increase your chances of acquiring coins, use (Recommended!) characters any time you start up an Episode. There are over 500 coins and you don't have to collect ALL of them (just most).