After trick-or-treating, you give the candy to Sally in the pumpkin patch.You give the lemon flavored sucker to Linus.
You give the candy BAG to Pigpen.
You give it to Sally in the pumpkin patch. She missed trick-or-treating.
Once you finish trick-or-treating, take the candy to the pumpkin patch and give it to Sally.
You go to the pumpkin patch and give it to Sally. She leaves and then Lucy will come get Linus and award you with the Island Medallion.
After you have collected the Trick or treat candy, take it to the pumpkin patch and give it to Sally. After Snoopy appears and Sally leaves, you will fade to later that night and Lucy will give you the Island Medallion.
After you have collected the Trick or treat candy, take it to the pumpkin patch and give it to Sally. After Snoopy appears, and Sally leaves, you will fade to later that night and Lucy will give you the Island Medallion. (see related solution question below)
You can find the pen after you give Linus's candy bag to Pigpen, who is on the street. In return, he will give you a lemon-flavored sucker. Then go back into the house and give it to Linus, who gives you his party invitation. Pick up the pen, which he was using to write a letter to the Great Pumpkin.
After you have collected the Trick or treat candy, take it to the pumpkin patch and give it to Sally. After Snoopy appears, and Sally leaves, you will fade to later that night and Lucy will give you the Island Medallion. (see related solution question below)
Go back inside and give it to Linus.
Give it to Pigpen (the dirty kid) outside and to the right. Then go back inside and give the lemon sucker to Linus, who gives you his invitation to the party. Also take his pen from the desk.
When you give him the lemon sucker from Pigpen. He gives you his invitation to the party, and you can get his pen from the desk.
Nothing. This is the end of the quest. After Snoopy shows up and Sally leaves, the scene fades to later, when Lucy comes to get Linus and gives you the Medallion.
Go back in the house and give it to Linus.