List of Jim Halpert Pranks

Season One
Encased Dwight's stapler in Jell-O.
Built a pencil fence between his and Dwight's desk.
Encased Michael's 'World's Best Boss' mug in Jell-O.
Changed Dwight's assigned "race" from "Asian" to "Dwight" in the Diversity Day exercise(deleted scene).
Locked Dwight inside his own "work space".
Assisted Pam in preparing a list of absurd medical conditions- Spontaneous Dental Hydroplosion.
Agreed to participate in an "alliance" with Dwight, using it to feed his paranoia in a variety of ways including dying his hair and hiding him in a box.
Convinced Dwight to purchase a purse from a vendor, and then made fun of him for having it (deleted scene).
Season Two
Found Dwight's wallet in the parking lot, and decided, on Pam's suggestion, to give the wallet back to Dwight intact and unchanged. Dwight, not believing Jim, immediately canceled all his credit cards (deleted scene).
Dwight's coffee mug- Threw stuff in it.
Posted Dwight's résumé online with Pam, specifically for positions in Alaska.
Relocated Dwight's desk to the men's restroom.
Popped Dwight's fitness orb.
Convinced Dwight a Thursday was a Friday causing him to be late for work the next day.
Made Dwight believe that Jim's party was a surprise party for Michael. This prank backfired when Michael crashed the party.
Put Dwight's things in vending machine. Following this, he hands Dwight a bag of nickels, probably just removed from his phone handset.
Gave Dwight dubious "tips" on public speaking The prank backfired; the speech was a smashing success.
Tried to convince Dwight in an interview that Dwight had smoked marijuana.
Paid coworkers five dollars to call Dwight "Dwayne" for an entire day.
Convinced Dwight an abandoned infant was in the women's restroom causing him to walk in on Meredith "on the can."
Used a macro so that every time Dwight typed his name, it appeared as "diapers".
Replaced Dwight's writing instruments with crayons.
Incrementally increased the weight of Dwight's telephone handset then abruptly decreased the weight, causing Dwight to smack himself in the face with the phone.
Placed a bloody glove in Dwight's desk and attempted to convince him that he had committed murder. Dwight, in fact, thought that "Jim was the real killer."
Created an absurd identification badge for Dwight.
Repositioned Dwight's desk by moving it an inch at a time over the course of the day. Encircled Dwight's desk in police tape (deleted scene).
Convinced Dwight With Pam, that he had telekinetic powers.
Caused Dwight to fold in Texas Hold Em whenever he coughed as Dwight believed this was Jim's tell that he had good cards.
Season Three
Held Dwight's bobblehead doll for $5 ransom (Third Season Primetime Preview)
Encased Andy's calculator in Jell-O This prank backfired when Andy reacted violently.
Convinced Dwight and Michael that gaydar was a genuine electronic device that can be purchased. Later sent "gaydar" to Dwight, which Dwight amusingly used and set off the sensor on himself.
Gained access to Dwight's hotel room at a paper convention in Philadelphia just to find a hooker in his room that is actually Angela Martin, though he doesn't appear to recognize her.
Made high-pitched noises with Pam, hoping Dwight would schedule an appointment with an ear doctor, called "pretendonitis".
Sent faxes signed "Future Dwight" on Dwight's own stationery.
Stared at Dwight's forehead for no reason.
Gave Andy wildly incorrect "tips" on winning Pam's affections. Pam later returned the favor in a deleted scene.
Ordered fifteen large sausage pizzas to the office under the name 'Dwight' (deleted Scene)
Tricked Dwight into believing he was being recruited by the CIA and made him destroy his cell phone.
Told Dwight that the Benihana Waitress couldn't remember how to butcher a goose, causing Dwight to tell her how to in violent detail.
Told Dwight that the Benihana Waitress was asleep when really Andy was telling her to close her eyes and imagine her dream home.
"Narrated" Dwight's absurd behavior when Dwight taped a meeting. This backfired when Andy took the joke too far.
Glued Dwight's office drawers together (deleted scene) .
Changed Dwight's voicemail to make him sound like a chipmunk (deleted scene).
Told Dwight there was a 4am meeting who was the only one to attend (deleted scene).
Shipped Dwight's desk by mail to Roswell, New Mexico, where Dwight was vacationing (deleted scene).
Slapped Dwight across the face when Dwight claimed that "70% of attacks are from the rear.
Intentionally slammed the brake smashing Dwight's face into the driver's seat when Dwight sat in the back of Jim's car saying that "The back is the safest part and the driver will always protect his side first."
Switches a squeaky chair with Karen who then switches it with Andy.
Hid Andy's cell phone in the ceiling tiles then called it repeatedly. This Andy again reacted violently, punching a hole in the wall.
Hired a Benjamin Franklin impersonator instead of a male stripper for Phyllis's bachelorette party.
Told Dwight that the Ben Franklin impersonator was the real Franklin.
Conditioned Dwight to expect an Altoid mint each time he heard a computer chime through use of the Pavlovian Theory.
Manipulated Dwight into patrolling for wedding crashers Dwight mistakingly evicts a guest who suffers from dementia.
Convinced Dwight that he was turning into a vampire.
Hid the key to Michael's straitjacket.
Relayed intentionally incorrect messages from Dwight to Andy when Dwight was "shunning" his traitorous co-worker.
Dressed up as Dwight and parodied his speaking style. Dwight returned the favor but was unable to successfully mimic Jim's pattern of speech and insult him for who he was.
Named his team Voldemort as a response to Dwight naming his Gryffindor.
Season Four
Hired Elizabeth the Stripper by convincing Michael she was a "rabies nurse".
Sent IMs with Pam, convincing Dwight that the Dunder Mifflin website achieved self-awareness.
Along with Michael and Dwight put on a fake mustache and infiltrated Karen's branch. This was admittedly against his will.
Deliberately guessed the wrong names playing "Celebrity" when Michael was giving blatantly obvious clues.
Stole Jan's CD.
Linked Dwight's cell phone to his Bluetooth headset and took his calls. Additionally forwarded Dwight's office phone to his own.
Season Five
Recorded with a stopwatch all personal time that Dwight takes in order to prove Dwight wrong when he claimed that he has never stolen company time.
Seemingly wrapped Dwight's chair, desk and everything on it in wrapping paper when in fact he actually replaced his chair and desk with a Christmas-wrapped cardboard version of the desk, and an incredibly loosely assembled chair. It became evident when Dwight tried to sit and everything collapsed.
Planted a 500 foot red wire from the back of Dwight's computer to the top of a telephone pole .
Wore a tuxedo to mock Dwight's dress code memo. The prank backfired when Charles Miner from Corporate visited the branch and considered Jim's prank unprofessional.
Tricked Michael into thinking it's 5 o'clock with the assistance of the rest of the office.

Well, there you have it. Oh, Jim.