The final boss always happen to escape death each time you fight it. New characters who join you always have good stats even though they've never fought before. Robots eat, sleep, use potions etc. You can fight in hundreds of battles, but you don't actually become any more powerful before you reach the next level. Monsters come out of nowhere as you walk around, but nothing will touch you if you stand still.
Monsters carry money.
You can attack something with a sword without having to run up to them first. You can punch a hedgehog with bare fists and suffer from no ill effects. Monsters must decompose so quickly, they disappear as soon as you kill them. You can never run away from bosses, even though you can run away from anything else. You can never cast instant death spells on bosses, even though they're just the same as any other monster except a bit tougher.