Eggman can't pay the tax bill for his trash pickup, so to raise the necessary funds, he must turn his evil lair into a luxury resort.
- Admiral Beaverton
- Ballot Stuffer Bot
- Child Monkey
- D.B. Platypus
- Diane Aardvark
- Dr. Eggman
- Fastidious Beaver
- Fennec Garbage Man
- Lady Goat
- Lady Walrus
- Leroy the Turtle
- Mayor Fink
- Old Monkey
- Obliterator Bot
- Redd Heron (First appearance)
- Secret Review Magazine (Mentioned)
- Sheep Villager
- Team Sonic
- Walrus Baby
- Walrus Child
- Wild Cat
- Amy's Hammer
- Doomsday Device
- Particle Accelerator (Mentioned)
- Wrist controller
- Tails has the Unbolterizer, a device he invented and completed in "Circus of Plunders".
- Orbot recalls how Dr. Eggman tried to use his Doomsday Device in "Double Doomsday".
- Dixon is missing his pony tail in this episode.
- When Dr. Eggman moans the destruction of his lair, Redd Heron can be seen standing behind him. However, when Redd starts to speak, he is suddenly shown standing besides Eggman.
Title in other languages
|French||Le Grand Hôtel Eggman||The Grand Hotel Eggman|
- Nine days before this episode aired on Boomerang, Bill Freiberger released the title card for this episode on Twitter as a teaser.
- The title of this episode is a pun of the behavior "Insanity".
- In this episode, Knuckles wears his towels around his torso in the same manner he wore the blankets in "Cabin Fever".
- Orbot breaks the fourth wall when he mentions that Dr. Eggman hasn't used his Doomsday machine since sometime in the beginning of season 1.
- ↑ 1.0 1.1 Sonic Boom: Inn Sanity. Zap2it.com. Retrieved on 8 June 2017.
- ↑ Bill Freiberger on Twitter. Twitter (29 June 2017). Retrieved on 29 June 2017. “Bill Freiberger: 225: Eggman can't pay the tax bill for his trash pickup, so to raise the necessary funds, he must turn his evil lair into a luxury resort.”
- ↑ Bill Freiberger on Twitter. Twitter (22 June 2017). Retrieved on 22 June 2017. “Bill Freiberger: A #sonicboom preview for next Saturday: Ep. 225 "Inn Sanity" written by Sam Freiberger @evilsamdestroyr.”
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