Fungus makes his debut as Mildew's pet sheep in the Dragons: Riders of Berk episode, "How to Start a Dragon Academy". Mildew, fed up with dragons destroying his cabbage, grabs Fungus, his staff, and helmet to go complain to Chief Stoick. Later, Fungus and Mildew watch avidly at the Arena when they think the Dragon Riders are going to get chewed out by Stoick, but finding out later that the dragon rider's only get praised, Mildew is left to complain and Fungus stays to watch the riders happily.
A Trickster's Accomplice
In the episode, "In Dragons We Trust", Fungus serves as an accomplice to Mildew in perpetrating vandalism to blame on the resident dragons of Berk and get them banished. Also in this episode, a picture of Fungus is on the wall, next to Mildew's deceased wives. This may suggest he cares more about his sheep, then his wives.
Captive of the Outcasts
In "We Are Family, Part 2", Mildew and Fungus are on Outcast Island, seemingly as prisoners. Alvin the Treacherous threatens to eat lamb stew made from cooking Fungus (despite the fact that Fungus is full grown and not a lamb). This however, is an elaborate ruse so that Mildew can learn about training dragons from Hiccup so that the Outcasts can also Train dragons. Fungus is then reunited with his owner as the Outcasts celebrate their victory.
Moving to Icestorm Island
In the game, School of Dragons, Mildew and Fungus are introduced into the game in the expansion called "Icestorm Island". Mildew and Fungus have moved there to get away from dragons and find peace and quiet.
Wherever Mildew is, Fungus usually isn't far behind. Fungus usually follows Mildew, but it isn't known if he is really loyal to the grumpy old Viking. Though Fungus does show that he loves his owner and Mildew has shown that he deeply cares.
Fungus is the first sheep in the series to be considered a villain, but he changed his ways when his master turned good.
Fungus is the standard white, woolly sheep with a black face and small, thin curled horns. However, Unlike the other sheep seen in the franchise, Fungus has a slightly greenish nose and long peg like teeth.
Compared to other sheep on Berk, Fungus is bit different.
- Intelligence: He is shown to be bit smarter than others of his kind. As he knew that Hiccup was spying on his master and tried to warn his master. Also, he knew he was playing his part of pretending to become Mildew's last meal to be more convincing to Hiccup.
|Riders of Berk|
|1. "How to Start a Dragon Academy":||Appears||11. "Heather Report, Part 2":||Absent|
|2. "Viking for Hire":||Absent||12. "Thawfest":||Absent|
|3. "Animal House":||Absent||13. "When Lightning Strikes":||Appears|
|4. "The Terrible Twos":||Absent||14. "What Flies Beneath":||Absent|
|5. "In Dragons We Trust":||Appears||15. "Twinsanity":||Absent|
|6. "Alvin and the Outcasts":||Absent||16. "Defiant One":||Absent|
|7. "How to Pick Your Dragon":||Absent||17. "Breakneck Bog":||Absent|
|8. "Portrait of Hiccup as a Buff Young Man":||Absent||18. "Gem of a Different Color":||Absent|
|9. "Dragon Flower":||Appears||19. "We Are Family, Part 1":||Appears|
|10. "Heather Report, Part 1":||Absent||20. "We Are Family, Part 2":||Appears|
|Defenders of Berk|
|1. "Live and Let Fly":||Absent||11. "A View to a Skrill, Part 2":||Absent|
|2. "The Iron Gronckle":||Absent||12. "The Flight Stuff":||Absent|
|3. "The Night and the Fury":||Absent||13. "Free Scauldy":||Absent|
|4. "Tunnel Vision":||Absent||14. "Frozen":||Absent|
|5. "Race to Fireworm Island":||Absent||15. "A Tale of Two Dragons":||Absent|
|6. "Fright of Passage":||Absent||16. "The Eel Effect":||Absent|
|7. "Worst in Show":||Appears||17. "Smoke Gets in Your Eyes":||Absent|
|8. "Appetite for Destruction":||Absent||18. "Bing! Bam! Boom!":||Absent|
|9. "Zippleback Down":||Absent||19. "Cast Out, Part 1":||Absent|
|10. "A View to a Skrill, Part 1":||Absent||20. "Cast Out, Part 2":||Absent|
|"Dragons: Rise of Berk":||Mentioned||"School of Dragons":||Appears|
|"How to Train Your Dragon":||Absent||"How to Train Your Dragon 2":||Absent|
|"DreamWorks Dragons: Wild Skies":||Absent||"Dreamworks Dragons: Dawn of New Riders":||Absent|
|"Dragons: Titan Uprising":||Absent|
|Non-Dragon Characters of How to Train Your Dragon|