The two activities that you first do in Charlie Brown's back yard are
1) Snoopy blows leaves into the pile
2) Linus jumps on the pile
Linus then leaves to mail his letter, so you follow him. When he realizes that he is missing his blanket, go back to the pile and retrieve it for him. When he mails the letter, go left again for the football scene.
After you get the invitation and the pen, Charlie Brown and Snoopy are in his backyard, on the far left of the island. You will play a mini-game as Snoopy gathers some leaves in a very relaxed manner.
That was a glitch in the island that hopefully does not occur again, because the only way to get past it is to restart the island. The leaves fall automatically when you see Charlie Brown and Snoopy and start the game.
Pick up his pen, and go outside, to the far left where Charlie Brown and Snoopy are gathering leaves.
Once you have delivered the pumpkin to Lucy, given Pigpen the bag and Linus the lemon sucker, go far left (Charlie Brown's back yard) and Snoopy will gather leaves by blowing them onto the pile.
Charlie brown and Snoopy do not appear in Charlie brown's back yard (to the left) until you have completed the pumpkin rolling process and gotten the party invitation. The sequence of events is: Go to Pumpkin Patch Weigh the pumpkins Roll one back to Lucy's house Get the bag from Linus Give the bag to Pigpen (outside, right) Give the sucker to Linus (get invitation, and pen) Now you can go to the far left of the island, where Charlie Brown and Snoopy are raking leaves.
Once you have the invitation and the pen, go outside, far left, to where Snoopy and Charlie Brown are gathering leaves.
On Great Pumpkin Island, Snoopy and Charlie Brown are in front of the pumpkin patch, searching for the Great Pumpkin. They are part of the Halloween-themed adventure where players help them navigate through various challenges to find the mysterious holiday figure.
When you finish rolling the pumpkin from the patch, give Pigpen the bag, and give Linus the lemon sucker, you can play the leaf scenes in Charlie Brown's back yard (to the left). *For awhile, the leaves were not falling for Snoopy to blow into the pile. This should be working now. If this happens, you may have to restart the island.
It is under the pile of leaves.
Charlie Brown is originally outside Linus and Lucy's house, and Lucy is inside. When you complete the pumpkin patch sequence, Charlie brown is with Snoopy in his backyard (left). When you finish collecting the leaves, and Linus jumps in them, follow him to mail his letter. After he does (with a delay to recover his blanket), Lucy and Charlie Brown are playing with the football in the yard.
Although you see him at the start of the island, and in the discussion with Linus about the Great Pumpkin, Charlie Brown does not appear in his backyard until you have completed the Pumpkin selection, Pumpkin rolling, and Pigpen parts of the game. 1) In the Pumpkin Patch, weigh the pumpkins and give the heaviest to Lucy 2) Roll the Pumpkin safely to Linus and Lucy's house 3) Take the bag from Linus and give it to Pigpen outside 4) Give the lemon sucker to Linus and pick up his Pen from the desk Now Charlie Brown and Snoopy will appear at the leaf pile in the backyard.
The leaves are in Charlie Brown's back yard, left of main Street. You can go there to have Snoopy gather leaves rather lazily by blowing them through the air. When he is finished, Linus will jump into them. Because of the "sucker" comment by Linus, you cannot gather the leaves until you have rolled the pumpkin home from the pumpkin patch, given the bag to Pigpen, and given the lemon sucker to Linus.