Digimon World: Dawn and Dusk/Find Tsukaimon

Starting the quest
1. Go to Dark Office

2. Enter Dark Center

3. Talk to Myotismon at the Dark Species Quest Counter

4. Go and talk to Pagumon at Dark Plaza

Finding Tsukaimon
5. Tsukaimon can be found in Thriller Ruins

6. When you first enter first go up the ladder closest to you and open the chest.

7. Go back down and walk towards the exit at the north eastern corner you current location

8. Go North until you hit the wall

9. Keep going East until you see a ladder

10. Go up the ladder, open up the chest on the leftmost part of the platform

11. Go and talk to Tsukaimon. He will tell you that he will return to the city.

12. Backtrack your way to the entrance of Thriller Ruins. (Alternate routes are still blocked off at this point)

13. Return to Pagumon in Dark Plaza. He will tell you to return to Dark Center for your Award.

14. Get your reward from Myotismon