Complete the indicated task.

Talk to Strong Sad during Part 1.
Talk to Strong Sad about the invisible fence two times during Part 1.
Search the shower in the House of Strong.
Use the pillow on Strong Sad during Part 1.
Put the Pilot Wings medal on Strong Sad during Part 2.
Talk to Strong Sad about Strong Badia during in Part 2.
Talk to Strong Sad about Bleak House during Part 2.
Use the fake sword on Strong Sad in Bleak House.
Talk to Strong Sad about Strong Badia after burning all his items.
Use the tuning fork on Strong Sad at the Homsar Reservation.
Use the Fake Sword on Strong Sad while at the Homsar Reservation
Talk to Strong Sad at Marzipan's.
Complete the game, then talk to Strong Sad in his room.