Once you finish trick-or-treating, take the candy to the pumpkin patch and give it to Sally.
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.
After you complete all 4 games at the Halloween party, you go trick-or-treating with the gang. Bring a bag of candy to Sally in the pumpkin patch.
After beating the four games at the party, you go directly to trick-or-treating. You do NOT have to catch anything. You will receive a bag of candy to take to Sally and Linus in the pumpkin patch.
When you select the heaviest pumpkin in the pumpkin patch for Lucy, and roll it back to her house, Linus gives you his bag. (Take it to Pigpen outside.)
When you select the heaviest pumpkin in the pumpkin patch for Lucy, and roll it back to her house, Linus gives you his bag. (Take it to Pigpen outside.)
The amount of pumpkin candies that come in a bag will vary by a few. Bags of candy are sold by weight only.
It is not recommended, as a glitch exists which can prevent you from getting a bag of candy, and therefore you cannot complete the island. If you leave during the Halloween party, be certain to save rather than exit during one of the challenges. You don't have to actually CATCH any of the candy. After the 4th house, you get a bag automatically.
You have to go to the pumpkin patch and talk to the boy you have to help him pick the heavest pumpkin for his sister the you have to help him get it home without breaking it then you go in the house and talk to him again and he will give you the bag.
Once you have beaten the challenges at the Halloween Party, you will go trick-or-treating with the gang and then return to the pumpkin patch with your bag of candy.Note : you do not actually have to catch any candy at any of the four houses. You will still receive a bag at the end of the sequence.(*For a complete solution, see the related question below)
Take the bag of treats to Linus and Sally in the pumpkin patch. This is essentially the end of the quest, as Sally will leave and Lucy will bring you the Island Medallion.
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.
He is with Snoopy in his backyard, but only after you have gotten a pumpkin for Lucy, a bag for Pigpen, and a lemon sucker for Linus.