Alvin and the Chipmunks Wiki
Alvin and the Chipmunks Wiki

Mysterions is an episode of the ALVINNN!!! and The Chipmunks series.


When Theodore discovers Alvin and Simon have a secret club, he promises not to tell anyone if they let him join.[2]




  • A sneak peek clip was posted on Nicktoons UK.
  • The My Little Horsie club name is most likely a reference to Hasbro's My Little Pony franchise.
  • The Orb makes a reappearance.
  • When Theodore's practicing the secret handshake for himself, an instrumental of "Look at Me Now" plays shortly during the scene.
    • The instrumental is then heard again later on, along with an instrumental of "Run the Runway."
  • The mask that Brittany wears in Brittany The Body Snatcher makes a reappearance on the TV.
  • Some of The Chipmunks' old outfits make a reappearance.

Past Secret Clubs[]


  1. Top 150 Saturday Cable Originals: 8.17.2019,, Retrieved 2019-08-21.
  2. Alvinnn!!! and the Chipmunks: Mysterions,, Retrieved 2019-07-09.