Missing Monsters - DS Remake

[Kalisiin Kumaki]

I am missing the following monsters from my Big Book Of Beasts - what area do I look for them?

Loathsome Leek

Tree Feller

Sea Fortress

Just those three. I have everyone else. Just not sure where you go looking for these three, so that I can complete my book.

UPDATE: Found the Loathsome Leek and the Tree Feller - both around Ghent.

Still looking for the Sea Fortress...anyone want to give me an idea where to get it?
I know it MUST be underwater somewhere....

UPDATE 2: Found the Sea Fortress. On the water near the Isle O Smiles in the Dream World.

I now have a completed Big Book Of Beasts!

[Vireo Gilvus]

Congratulations!

Do you get anything for fighting all the monsters in the book? You do in DQ4 DS.

[Kalisiin Kumaki]

I did not get anything. I don't know if there's something special you have to do outide of just using the book when it's full.