Eliminate 99 of these! - The Rememberer -

Make sure to report to The Rememberer of the result after eliminating the monsters!

...

It must be something important for you to talk to me here... oh hey there! You did manage to eliminate 99 Green Mushrooms. I can see 99 Green Mushrooms hovering behind you. Incredible!

I can tell you're noble enough to do this without expecting anything return, but this is just my way of saying thank you for helping us out. Please take it.

You're not saying that you're going to end your journey here, right? Inside the Dungeon, you'll find nothing but really powerful, dangerous monsters. I've put up bulletin boards everywhere, so find those. I'll reward you well, if the job is done right.

Oh hey there! You did manage to eliminate 99 Green Mushrooms. I can see 99 Green Mushrooms hovering behind you. Incredible!