Where Have All The Sonics Gone?

"Where Have All The Sonics Gone?" is the ninety-third episode in the Sonic Boom television series. It first aired on 19 August 2017 in the United States.

Synopsis
Morpho sends Sonic to a dimension where he never existed. Sonic must unite his gang and help take back the alternate dimension village.

Appearances
Characters:
 * Badnik (alternate dimension) (Sonic Boom)
 * Scorpion Bot (alternate dimension) (multiple)
 * Beaver Policeman (alternate dimension)
 * Beth the Shrew
 * Comedy Chimp (alternate dimension)
 * Dave the Intern
 * Dave the Intern (alternate dimension)
 * Dr. Eggman
 * Fennec Male
 * Lady Goat
 * Lady Goat (alternate dimension)
 * Lady Walrus (alternate dimension)
 * Lord Eggman
 * Metal Sonic
 * Mike the Ox
 * Mombot
 * Morpho
 * Old Monkey
 * Rabbit Girl
 * Rabbit Girl (alternate dimension)
 * Rebellion
 * Fennec Male (alternate dimension)
 * Gogobas (alternate dimension)
 * Mike the Ox (alternate dimension)
 * Team Sonic (alternate dimension)
 * Amy Rose (alternate dimension) (Sonic Boom)
 * Knuckles the Echidna (alternate dimension) (Sonic Boom)
 * Sticks the Badger (alternate dimension)
 * Miles "Tails" Prower (alternate dimension) (Sonic Boom)
 * Wild Cat (alternate dimension)
 * Wolfie (alternate dimension)
 * Reindeer Girl
 * Shadow the Hedgehog
 * Stratford (alternate dimension)
 * Team Sonic
 * Amy Rose
 * Knuckles the Echidna
 * Miles "Tails" Prower
 * Sonic the Hedgehog
 * Sticks the Badger
 * Vector the Crocodile
 * Wolf Policeman (alternate dimension)
 * Wild Cat

Locations:
 * Sonic Boom World
 * Seaside Island
 * Amy's House
 * Hedgehog Village
 * Village Center
 * Meh Burger
 * Sonic Boom World (alternate dimension)
 * Lord Eggman's Lair
 * Seaside Island (alternate dimension)
 * Gogoba Village (alternate dimension)
 * Knuckles' Upper-Body-Only Workout Center
 * Hedgehog Village (alternate dimension)
 * Village Center (alternate dimension)
 * Gourmet Burger

Items:
 * Amy's Hammer
 * Communicator
 * Wrist controller

Vehicles:
 * Eggmobile (alternate dimension) (Sonic Boom)
 * Knuckles' monster truck

Continuity

 * Mombot, a robot Dr. Eggman made in "Mombot", makes a reappearance.
 * Morpho is still an associate of Dr. Eggman as a result of the events in "Eggman's Brother"; both villains even recall the events of said episode.
 * Eggman mentions to Morpho that one of the things on their to-do list was not to send Sonic to a dimension where there is another version of him, which would eventually cause the destruction of both dimensions; this nearly happened when an alternate-dimension Knuckles appeared in "Two Good to Be True".
 * Amy recalls Morpho's deceit in "Eggman's Brother".

Goofs

 * In this episode, Lady Goat's fur has the same color it had during season one of the Sonic Boom television series.

Trivia

 * Eight days before this episode aired on Boomerang, Bill Freiberger released the title card for this episode on Twitter as a teaser.
 * Excluding himself, all the characters Morpho morphs into at Mombot's are the Sonic Boom incarnations of the main cast from the Sonic the Hedgehog video games.
 * This scene might be a nod to the fans' demands for more Sonic video game characters to appear in the TV series.
 * The title of this episode is a parody of the name for the modern folk-style song "Where Have All the Flowers Gone?".
 * Sonic's quote "A shortcut to main street hidden in the canyon? Sweet easter egg" is a reference to the common Easter egg trope in modern media.
 * Morpho states two famous catchphrases in this episode:
 * The first was him saying in his Sonic form "What's up Doc?", Bugs Bunny's catchphrase.
 * The second was "Gotta catch 'em all!" which is the tagline of the Pokémon franchise.
 * Knuckles calls Sonic "Mr. Needlemouse", a reference to what Sonic was originally named in his conception.
 * The background music that plays when Sonic returns to his dimension is similar to the main theme for the Back to the Future franchise.
 * Tails and Sticks do not have a single line of dialogue in this episode.