Dora the Explorer Wiki

This article is about the character. If you were look for his song with the same name, click here.

The Grumpy Old Troll (sometimes known as Mr. Troll) (Theoretical name: Furioso O. Troll) is the former secondary antagonist, and currently the anti-hero of Dora the Explorer, a troll who only speaks in English and lives under the Troll Bridge that Dora and Boots sometimes come across. Whenever they try to cross his bridge, he will jump out and sing a song telling them that they need to answer a riddle (or other challenge) or else they will not be allowed across. But never cause trouble together.


Grumpy Phrases[]

  • Hey!
  • No one goes over my bridge, (No one, No one, No one, No one!)/You [can't/won't] go over my bridge unless you [solve my riddle/do this/(other challenge)].


He is formerly almost always grumpy, He acts as a father figure to other characters. enjoys making up riddles for visitors who try to cross his bridge. However, he is shown to be happy at times and does have a few hobbies.


The Grumpy Old Troll is mostly yellow. He has a long orange beard and an orange mustache. He has white eyes with black pupils. He does not wear any clothing at all, although he had a barrel around his waist in The Fix-it Machine.


Season 1[]

Season 2[]

Season 3[]

Season 4[]

Season 5[]

Season 6[]

Season 7[]

Season 8[]

Dora and Friends: Into the City[]


  • The Grumpy Old Troll is based on the troll from the Norwegian folk tale Three Billy Goats Gruff. The difference is that the troll in this book eats anyone who crosses his bridge, while Grumpy Old Troll has riddles (or challenges) in order to cross his bridge.
  • He is similar to Oscar The Grouch from Sesame Street, both are grumpy and live under uninhabited areas (the Grumpy Old Troll lives under a bridge, while Oscar The Grouch lives in a trash can).
    • However, the Grumpy Old Troll became less grumpy (as he got happy when seeing fireworks, flying horses, and purple petunias at Play Park in The Happy Old Troll, and became impressed when Dora and her friends solved riddles starting with To the Monkey Bars), while Oscar still is grumpy.
    • Both have their own lands (Troll Land, and Grouchland).
  • The Grumpy Old Troll tends to be grumpy most of the time. In Season 1, whenever he sees Dora and Boots solve his riddles, he gets angry and lets out steam, or he would furiously stomp his feet, and as they cross, vows to stump them next time. On later episodes (Season 2 onwards, starting with "To the Monkey Bars"), he gets more impressed after Dora and Boots solve his riddles, since while he still wants them to solve one, he's now used to what normally happens.
  • Most of the time, anyone who tries to cross his bridge has to solve a riddle. Sometimes, he gives an instruction or a task to do.
  • In the episode with her name, Backpack referred to the Grumpy Old Troll as "Señor Troll".
  • The Happy Old Troll is the first time the Grumpy Old Troll is seen away from his bridge, excluding any of his character find segments.
  • The Grumpy Old Troll can be seen at his bridge during the intro from seasons 3-6 if one looks closely.
  • When Dora and Swiper traveled through time in "Dora's Christmas Carol Adventure", Grumpy Old Troll had no mustache and no beard when he was younger.
    • Also, when he sings his song, he says a variation of his name (Grumpy Little Troll) despite being the past, and he would most likely be in his 40’s.
  • Boots in his Pilot design had the same fur as the Grumpy Old Troll.
  • The Grumpy Old Troll and his wife Petunia appear in the Dora and Friends episode, "Return to the Rainforest".
  • The Grumpy Old Troll never makes an appearance in Go, Diego, Go!, nor was he even mentioned.
  • He is formerly one of the main villains of the show.
    • Because of this, he is replaced by El Mago.
  • The Grumpy Old Troll did lots of character finds.
  • In Dora's World Adventure!, there is a similar troll in Russia who looks identical to him, except he is purple, wears a brown Russian hat, and often says "no" in Russian.
  • His personality is similar to Pimply Paul of Horrid Henry who is quite grumpy and hated everyone and everything equally.
  • In the video game based on Dora Saves the Snow Princess, there's a similar troll named the Grumpy Cold Troll (theoretical name: Thomas Troll), except he is blue and white.
  • In Latin Spanish dub of Seasons 1-6, he is voiced by Luis Miguel Pérez; who is also voicing the Latin Spanish dub of Sheldon J. Plankton in SpongeBob SquarePants.


Major characters
Main Márquez family
Dora | Diego | Alicia | Mami | Papi | Abuela | Guillermo | Isabella | Daisy | Diego's mother | Diego's father | Perrito | Pinto | Lucky
Object helpers
Backpack | Map | Rescue Pack | Click | Bud | Mapa | Alicia's Rescue Rope
City friends
Pablo | Alana | Emma | Kate | Naiya | Sammy | Randy
Swiper | Grumpy Old Troll | El Mago | Magician | Tranimal | Bobo Brothers | Honking Edmontosauruses | Alejandro | Powell, Viper, and Christina X | Fifi | Sami | Fomkah | Ying Ying
Forest friends
Boots | Benny | Tico | Isa | Big Red Chicken | Señor Tucán | Fiesta Trio | Baby Jaguar | Baby Blue Bird | Val the Octopus | Chocolate Tree | Linda | Unicornio | Pirate Pig | Pirate Piggies | Pirate Parrot | Sammy
Glowy Star | Noisy Star | Tool Star | Magico Star | Woo-Hoo Star | Rocket Star | Saltador Star | Sliparooni Star | Supra, Ultra, and Mega Star | Artista Star | Helada Star | Disco Star | Gusty Star | Comfy Star | Silly Star | Explorer Job Stars (Policia Star | Baseball Star | Baker Star | Movie Star | Navy Star | Cowgirl Star) | Hero Star | Switchy Star | Fairy Star | Spy Star
Other friends
Azul | Roberto | Little Star | Scarecrow | Sabrina | Allie | Mariana | Paj | King's Mommy | King Juan el Bobo | Perrito's Twin | Amelie | Nelly | Pepe | Yuki | Camilla | Luis | Kicho | Mei | Enrique | Juma | Burgin | Yang | Shanti