After discovering a gigantic pearl, kingdom of Jollywood is attacked by a fire breathing dragon and the 7D are called in to put the fire out. When the Glooms hear about the Dragon, they go out to get a dragon of their own so they can train it to terrorize Jollywood. Unfortunately since the pet shop has nothing but a lizard with paper wings, Hildy uses a spell to turn Grim into a Dragon.
When the real Dragon sees Grim she mistakes him for her baby and takes him back to her cave. Disguised as Little Bo Peep, Hildy goes to the 7D for help and together they manage to rescue Grim and return the Dragon's real baby which hatched from the strange pearl that the 7D found earlier. It apparently turned out to be a Dragon egg.
- Bill Farmer as Doc
- Dee Bradley Baker as Dopey
- Billy West as Bashful
- Maurice LaMarche as Grumpy
- Scott Menville as Sneezy
- Stephen Stanton as Sleepy
- Kevin Michael Richardson as Happy
- Leigh-Allyn Baker as Queen Delightful
- Paul Rigg as Lord Starchbottom
- Kelly Osbourne as Hildy Gloom
- Jess Harnell as Grim Gloom
A nurse appears and give out lollipops after being called upon by Grumpy and Hildy after they're being hurt.
- The Nurse character resembles Hello Nurse from Animaniacs.
- This is because Tom Ruegger is a producer both The 7D and Animaniacs.
- This is the first time we see the Glooms and The 7D work together.