Endangered Monsters

So everything drops them, just the higher leveled mobs drop more Exp?
And doesn't kMS have the SP saver thing? Even making a warrior, you'd loose like 10-20 HP from advancing late.

Every normal monster drops them;
Higher leveled mobs have a greater probability of dropping more EXP, though this isnt always correct. The new Cynical Orange Mushroom, a lvl 10 mob drops the 500EXP variety, while some higher level mobs drop only the 30EXP ones.
And you can't trade or stock these things, the EXP is given when you pick the item up.