Diet [pronounced dee-yet] is a recurring character of The InBESTigators. He is portrayed by Ethan Pham.
In this episode, Diet, along with the other students in his class, introduce themselves to Ben, who did not feel welcomed. Soon, he, along with the other boys in his class, were impressed to see Ben put Disk Chockey in his mouth without breaking anything. So, he decided to enter the Disk Chockey Challenge, and participated in the fight of who would go next. Like the other students, Diet missed the challenge, and was quite bored by the competition, since he wasn't being fun for anyone.
In this episode, Diet signs up for Trimathlon, an online math competition where several schools compete against each other. Miss Tan selects the pairs, among them Diet along with Amelia. The two begin to study together without any difficulty. The next day, the first round of Trimathlon begins and Diet and Amelia make no mistake, but that was not enough to go to the next round, as Ezra and Kyle answered the last question before them.
Diet went, along with the rest of Grade 5, to Grade 5 Camp, and formed a cabin group along with Kyle, James, Justin, Ezra and Archie. When they get there, Diet, along with the others, were completely irritated by Kyle's rules, and when Archie was startled by what Kyle said about sleeping outside, Diet asked if he could sleep upstairs in his place. While preparing dinner, Diet was a victim of Kyle's pranks, the one when he presses the ketchup to put it on his sausage, the lid comes off and the sauce spills into the entire plate.
Diet is Toby's best friend. During "The Case of the Problematic Party", Toby was afraid to tell Diet that he had not invited him to his birthday party (that he could invite only 5 friends because the laser tag is too expensive), not to hurt him, however, Diet knew when he found Kyle's invitation, which he had lost while he was fighting karate with James. So Diet copied the invitation and distributed it to everyone secretly, but Diet didn't realize what it did to Toby. When Toby went to the infirmary pretending to be sick, Diet decided to go too, but he was afraid he would find out, so during the break, Diet was very welcoming to him and played with them a lot, but after the inbestigators found out, Toby he felt bad when he saw that his friend was upset because he was not one of the 5 guests to his party and made excuses. Although his parents were very angry, they felt guilty about the situation and decided to invite Diet as well.
|1. "The Case of the Curious New Girl":||Absent||11. "The Case of the Suspect Sprinkler":||Absent|
|2. "The Case of the Disappearing Deliveries":||Absent||12. "The Case of the Peculiar Pop Quiz":||Absent|
|3. "The Case of the Missing Solar System":||Absent||13. "The Case of the Science Sabotage":||Absent|
|4. "The Case of the Distressed Dancer":||Absent||14. "The Case of the Wrecked Rehearsal":||Appears|
|5. "The Case of the Sleepover Secret":||Absent||15. "The Case of the Perplexing Painting":||Absent|
|6. "The Case of the Big Mouth Challenge":||Debut||16. "The Case of the Turtle Thief":||Absent|
|7. "The Case of the Pestering Prank Caller":||Absent||17. "The Case of the Misplaced Mug":||Absent|
|8. "The Case of the Spoiled Sports Day":||Absent||18. "The Case of the Sad Little Sister":||Absent|
|9. "The Case of the Exciting Excursion":||Absent||19. "The Case of the Disoriented Drone":||Absent|
|10. "The Case of the Very Lost Notebook":||Absent||20. "The Case of the Baffling Birthday":||Absent|
|21. "The Case of the Concert Catastrophe":||Absent||31. "The Case of the Lousy Lunch Orders":||Absent|
|22. "The Case of the Soccer Saga":||Absent||32. "The Case of the Interrupting Intern":||Absent|
|23. "The Case of the Puzzling Pet Day":||Absent||33. "The Case of the Freaky Frequency":||Absent|
|24. "The Case of the Copy Cat":||Absent||34. "The Case of the Tricky Trimathlon":||Appears|
|25. "The Case of the Rosemary Riddle":||Absent||35. "The Case of the Burgled Bags":||Absent|
|26. "The Case of the Robot Robbery":||Absent||36. "The Case of the Distracted Detective":||Absent|
|27. "The Case of the Vanishing Koalas":||Absent||37. "The Case of the Fishy Fundraiser":||Absent|
|28. "The Case of the Extremely Empty Freezer":||Absent||38. "The Case of the Incredible Fortune Teller":||Absent|
|29. "The Case of the Miraculous Mini Golfer":||Absent||39. "The Case of the Unhappy Camper":||Appears|
|30. "The Case of the Problematic Party":||Appears||40. "The Case of the Triple Inbestigation":||Absent|
|Main||Maudie Miller · Ezra Banks · Ava Andrikides · Kyle Klimson|
|Recurring||Miss Tan · Mr. McGillick · Mrs Parides · Mr Barker · Poppy Banks · Justin · Caitlin · Mario · Pixie · Amelia Fitzgerald · Ruby · Esther McCarthy · James · Diet · Toby · Miranda · Archie|
|Guests||Billy · Sophie · Grace · Oliver · Joanna · Zac O'Halloran · Trish · Terri-Anne · Ebony · Claudia · Chuck · Hayley · Tall Girl #1 · Tall Girl #2 · Small Boy #1 · Small Boy #2 · Ben · Tom Franklin · Luka Franklin · Jack · Ethan McLaughlin · Ray · Mr Henderson · Jenny · Kelly Pickett · Dayani · Abby · Paul · Xavier · Kevin Milosec · Annie · Frank · Pip · Bella · Jayden · Judge · Tiana Jonhson · Ryan McCulloch · Chloe McCulloch · MacKenzie · Violet · Milo · Miss Ramsay · Zoya's Father · Kate · Angus · Evan · Owen · Coach · Savannah Gonzalez · Mayor · Emma · Dionne · Waiter · Rosemary · Butcher · Sylvia · Patrick O'Leary · Duncan Kent · Charlotte · Charlie · Lexy · Ally · Elijah · Dana · Cole · Gary · Sadie · Kyle's mum · Harriet Jacobi · Jordan · Natasha · Ramona · Small Boy · Sarah Banks|
- He might be the smallest boy in 5th grade.