アンスウェラー

Why are you asking this kind of questions then?

http://www.gamefaqs.com/boards/genmessage.php?board=921999&topic=48315546

Hint: It’s a beta artifact.

Edit: Some unintentional luls from flepa:

Anyway, sure to not have changed party (added some new people ? ) ? … dunno if something changed on jp version with new updates, but for what i noticed on us version, lvl 19 still takes more exp than lvl 20 also for demon.

XP table fresh off the client files of both the JP and EN version.
18 -> 19: 129,780
19 -> 20: 159,920
20 -> 21: 189,800

19 -> 20 is sure longer than 20 -> 21… not.

Additional hints: Only levels 31 to 80 have a problem, and the problem is the same one that caused hell levels in EverQuest. The same problem got applied to expert skills too. Blue has asked about this on Globe’s forum before the crash and I’ve answered why and what caused this syndrome.