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Dennis Chan

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pointing at himself
Full name

Dennis Lawrence ... Chan?

First appearance

Night Of The Zombie Kat

Played by

Cathy Weseluck (English)

Last appearance

The Kat Went Back Part Two

Dennis is Coop's 10 year old Asian-Canadian best friend and the main deuteragonist of the series. They used to hang out and defeat Kat together and his one of Coop's neighbors. His father's name is Henry. He lives with his high-tech family and lots of future technology.



  • He can whistle
  • He seems to be smarter than Coop, especially in scientific fields
  • Able to eat cat food and use a litter box to better know the enemy (When Bad Dogs Go Big)
  • Pulling strength: During the balloon journey in Birthday Bashed he is able to support his entire body weight (plus 6 helmets, for a time) dangling 1-armed holding the left ankle of Lorne with his right hand, for several seconds on-screen. It is possible he switched hands off-screen to save endurance between when they leave the bowling alley and when Dennis kicks Kat off a mountain.
    • In The Kat Went Back Part 1 he is able to swing a shovel hard enough that the metal head is indented into the shape of Coop's head upon hitting him, although Dennis was aiming for Kat. Naturally Coop was fine.
  • Pressing strength: he is strong enough to support Coop's weight with his upper body for over 15 seconds (and even walk while doing so, though he begins to wobble) in Turn The Other Cheeks when Coop sits on his head (Dennis holds his legs) to converse with Lorne and Harl who are standing on stools. Even when straight his arm length is less than the height of his head.


He and Coop are described as "two ten year olds" in a season 1 episode and celebrate birthdays in season 2.

He may be born July 27.

Episode Appearances Edit

Season 1 Edit

  1. Night Of The Zombie Kat
  2. Trespassers Will Be Persucuted
  3. Do Not Fort Sake Me
  4. Cookie D'Uh
  5. Nip/Duck
  6. Search and De-Toy
  7. Class Act
  8. Hypnokat
  9. The Allergy
  10. Just Me and Glue (non-speaking cameo)
  11. You'll Be Show Sorry
  12. How the Test Was Won
  13. Im Okay, You're a Kat
  14. Dial "B" For Babysitter
  15. The Grass is Always Meaner
  16. Happy Campers
  17. U.F. Float
  18. Play N'Ice
  19. House of Scream 
  20. Planter's Warp
  21. Curse of Tutankitty's Tomb
  22. Pet Peeved (non-speaking cameo)
  23. Don't Give Me No Static
  24. Storm Drained
  25. Teed Off
  26. Something Fishy In Owl Lake
  27. Dire Education
  28. Crouching Cooper Hidden Kat
  29. Tom-Kat Foolery
  30. In Dog We Trust
  31. Catch My Drift
  32. Suddenly Last Summer
  33. The Kitty Vanishes
  34. Capture The Kat
  35. Outer Space Chase
  36. Buzz Off
  37. Bend It Like Burtonburger
  38. Stall That Jazz
  39. Beware The Were-Coop
  40. Thrick or Threat
  41. Hack Kattack
  42. It's A Rocket, Man
  43. Kid Vs Kat Vs Christmas Part 1
  44. Kid Vs Kat Vs Christmas Part 2

Season 2 Edit

  1. Something About Fiona
  2. Tickled Pink
  3. Flea Brains
  4. Menace the Dennis
  5. Cheeks of Evil
  6. Reap it and Weep
  7. Blasteriod Blues
  8. Rat a Phoey
  9. Trash Talking
  10. Over the Radar
  11. Nuff' Said
  12. Rymes With Coop
  13. Bringin' the Heat
  14. The Three Aarghs
  15. Kat to the Future Part 1
  16. Kat to the Future Part 2
  17. Down the Drain 
  18. 9 to 5 to Oblivion
  19. When Bad Dogs Go Big
  20. The Bottyguard
  21. Rebel With a Claw
  22. Swap Wrecked
  23. Never Cry Sheep
  24. Kickin' Butler
  25. Keep On Rockin
  26. It's In The Bag
  27. King of the Pipsqueaks
  28. Down the Creek
  29. Turn the Other Cheeks
  30. Birthday Bashed
  31. Board Kat
  32. The Treasure of Sierra Munson
  33. Fangs for the Memories
  34. Drive-In Me Crazy
  35. Hair Brains
  36. Hot Dog Day
  37. Amazing Feet of Strength
  38. Me Coop, You Kat
  39. You Scream, I Scream
  40. Good Luck Harm
  41. Bootsville Most Wanted
  42. Kat of Dimonds
  43. Coop D'Etat
  44. The Incredible Shrinking Coop
  45. Who's Haunting Who?
  46. It's All In Your Head
  47. The Kat Went Back Part 1
  48. The Kat Went Back Part 2


Dennis has black hair and black eyes but unlike his father, he does not have an Asian accent.

His hair has a tuft at the back similar to Coop but is less tall and voluminous, resulting in him appearing shorter. Based on the shape of their skulls, he may actually be taller than Coop if hair is taken out of the equation. He comments in The Incredible Shrinking Coop that he is "already the smallest kid in gym class"

Each hand has 1 thumb plus 3 fingers.


  • in Kat to the Future his altered-timeline self grows a 4th finger on one hand, which upsets him.
  • in Hair Brains he has a flashback to "last time" Kat spread an alien illness. Dennis is shown growing a pair of antlers seconds after Kat sneezes purple goop on his head.


  • His last name may be Chan, source needed.
  • Dennis sadly laments that his middle name is Lawrence in Swap Wrecked after Lorne and Harley reveal theirs as Carnage and Doomsday
  • 13 February 2011 Rob Boutilier said that in the scripts, Dennis' last name was Lu, based on animation director Denny Lu, but that that surname was not legally cleared for broadcast so Dennis had no last name at that point.
    • This is probably why Henry had the initials HL on his suit in season 1.
  • In Turn The Other Cheeks when returning from Space Voyager Camp when Coop is glad they get to keep their jumpsuits (which were earlier mentioned to have their names on them) Dennis pulls on his left sleeve to inspect s white tag on the upper arm and complains "too bad mine says Denise". Coop's tag was on his right arm.


In the "missions" against Kat, Dennis usually comes up with the plans to defeat him, or else they just use the "Smash and Destroy" tactic. In the last episode of Kid vs Kat, his memory is not lost.

  • In his spare time (which episode?) he enters a secret room of his research room where the rare cases that have happened long ago.
  • In some episodes (which?) Dennis can show both ingenious and at the same time naive.
  • He's a fan of the series called "Captain Blasteroid", like Coop.
  • In Good Luck Harm he says he doesn't like potatoes.



Dennis and Coop's Birthdays are one day away from each other and they always wish for the same presents. They have been friends since preschool, Dennis is the only one who believes Coop about Kat, but he also believed Coop in preschool when Coop said that pigeons flew in threw the window and drank all of Dennis's chocolate milk while he was going to the bathroom.


In Beware The Were-Coop Dennis is looking in a monster book and says that Kat could not be a mummy-cat (though he does not specify why he thinks that) but that he could be a vampire-cat, since he has fangs.

Coop chides that the previous week, Dennis thought he was a leprechaun-cat. Dennis defensively maintains that it was a reasonable theory.

After Coop walks off, Dennis wonders aloud to himself if Kat might be a hydra-cat. He temporarily dismisses this, saying Kat only has 1 head, but then questions this assumption.

When Coop says Kat is drawing power from the moon, he then declares Kat must be a were-cat.

In later episodes Dennis appears to agree with Coop about Kat being an alien.


A girl named Estelle fell in love with Dennis in Kat of Diamonds.


In Birthday Bashed, when Phoebe wanted Coop's attention, she ends up drawing Dennis' attention. This might be because Dennis has a little crush on Phoebe.

Galleries by episodeEdit


Coop & Dennis is scarydy

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He dressed feminine:

  1. Once when Kat dressed him like Millie. ("Tickled Pink").
  2. Dressed like a Hawaiian girl. ("Cheeks Of Evil") with coop
  3. Like a blonde girl in a suit with a shepherd. ("Tickled Pink").
  4. Dressed like a cheerleader. ("Trash Talking")
  • painted nails
  • fixed hair

Other mediaEdit

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