| Dennis the Lazy Diesel | |
 Dennis in Thomas's Day Off. | |
| Number | D9 |
| Class | Lazy Diesel, petty scam artist, one of the Diesel High Priests |
| Livery | Grey |
| Line | Lazy Diesel |
| Built | 1949 |
| Affilations | Diesel Empire, Neutral, later good |
| Designers | Sir Oliver Bullied |
| Gender: | Male |
| Date to Birth |
December 10, 1949 |
| First Appearance | Thomas's Day Off |
| Voice actors Rob Rackstraw | |
Dennis the Lazy Diesel is the Fat Controller's number D9 engine. He was a very lazy diesel, essentially a male Daisy. He tried to trick Thomas into doing all his work. but after reversing into a ditch and with help of Thomas, he was able to finish his work and promised to be a Really Useful Engine from then on.
Appearances[]
- Season 9 - Thomas' Day Off
Specials:
- The Great Discovery (cameo)
Theme[]
- Dennis' theme is Conker's Drunk theme from Conker's Bad Fur Day for the N64.
Counterparts[]
- Izzy Gomez (TUGS/Salty's Lighthouse, both are lazy and grey)
- Luma (Super Mario Bros.)
- K. Lumsy (Donkey Kong Country)
- Hacker (Sonic the Hedgehog)
- Admiral Razorbeard's Lackey (Rayman, both are lazy)
- Charlie Dog (Looney Tunes, both are lazy)
- Zephyr Breeze (My Little Pony, both are lazy and trick the other characters to do the work for them)
- Wilford Wolf (Animaniacs)
- Luigi Risotto (The Simpsons, both are lazy)
- Weepy William (Horrid Henry, both of them have sad expressions)
- Molt (A Bug's Life, both are lazy)
- Joe Jack (King of the Hill, both are lazy)
- Beard Papa (Wreck-it Ralph, both are lazy)
- Alvin the Alien (The Wubbulous World of Dr. Seuss, both are lazy)
- The Blue Circle (Good Luck Charlie, both are lazy)
- Psyduck (Pokemon; both are lazy)
- Leland Turbo or Rod "Torque" Redline (Cars 2)
- Prisoner (Adventure Time; both are lazy)
- Garfield (Garfield): both are lazy
- Rodney or Sam (Total Drama)
- Oskar Kokoshka (Hey Arnold, both are lazy)
- Phil Winklestein (VeggieTales)
- Greendale Rocket (Casey Jr. and Friends, both are lazy)
- Max (The Muppet Movie)
- Two-Ton or Steranko (Teenage Mutant Ninja Turtles)
- Grim Creeper (Skylanders, both are lazy and dull-colored)
- Krizzalid (The King Of Fighters, both are lazy)
- Grumblemon/Grottomon (Digimon)
- Slink the Slug (Maya the Bee, both are lazy)
- Doug (Randy Cunningham: 9th Grade Ninja, both are lazy)
- Forkington (Cuphead)
- Modem (The Brave Little Toaster)
- Egwind (Animaniacs)
- Pen Pal (Tiny Toon Adventures)
Gallery[]
Dennis on the cover of his My Thomas Story Library Book
Dennis with the diesels in "The Great Discovery"