One Jem Too Many
Episode Synopsis: Clash poses as Jem at public appearances, acting extremely rude and hostile, giving the press a heyday. 

Raya Grey & Indigo pantsuit
First appears in One Jem Too Many and again in: The Fan, Alone Again, Britrock, Hollywood Jem Part 1, Beauty and the Rock Promoter, Homeland, Heartland, Midsummer Night's Madness, That Old Houdini Magic
Model sheet number Unknown
Hasbro did not produce this fashion.

Imagine Me Jem
Makes its first and only appearance in One Jem Too Many.
Model sheet number Unknown. This is a video-only fashion, and was most likely designed by the video's designer, and will not be seen during any non-video segments.
Hasbro did not produce this fashion.
Imagine Me Jerrica
Makes its first and only appearance in One Jem Too Many. 
Model sheet number Unknown. This is a video-only fashion, and was most likely designed by the video's designer, and will not be seen during any non-video segments.
Hasbro did not produce this fashion.
Jem Purple Triangle Dress (Clash in Jem disguise #1)
First appears in One Jem Too Many and again in: Straight From the Heart, A Change of Heart.
Model sheet number Unknown
Hasbro did not produce this fashion.
Raya Pink/Green dress and jacket
First appears in One Jem Too Many and again in: The Treasure Hunt, Trick or Techrat, A Father Should Be....
Model sheet number Unknown
Hasbro did not produce this fashion.
Credits
Thanks to Cosmic Falcon for donating this drawing to the wardrobe section!
Clash Cleaning Lady Disguise
Makes its first and only appearance in One Jem Too Many. 
Model sheet number Unknown
Hasbro did not produce this fashion.
Comments
I guessed on the footwear.   They actually kinda match!
Aja Strappy Red Blouse outfit
First appears in One Jem Too Many and again in: The Fan, Alone Again, Out of the Past, Hollywood Jem Part 1, The Stingers Hit Town Part 2, A Change of Heart, A Father Should Be....
Model sheet number Unknown
Hasbro did not produce this fashion.
Credits
Thanks to Cosmic Falcon for donating this drawing to the wardrobe section!
Shana long blue shirt w/orange rectangles
First appears in One Jem Too Many and again in: The Fan, Father's Day, Journey Through Time, Britrock, Hollywood Jem Part 1, Midsummer Night's Madness, That Old Houdini Magic, Straight From the HeartRiot's Hope, A Change of Heart, A Father Should Be....
Model sheet number Unknown
Hasbro did not produce this fashion.
Clash Purple Triangle Dress (Jem Disguise #1)
Makes its first and only appearance (on Clash, anyway) in One Jem Too Many.
Model sheet number Unknown
Hasbro did not produce this fashion.
Rio Yellow shirt/blue pants
First appears in One Jem Too Many and again in: KJem, Trick or Techrat, Rock 'N Roll Express, Hollywood Jem Part 2, Midsummer Night's Madness, A Change of Heart
Model sheet number Unknown
Hasbro did not produce this fashion.
Credits
Thanks to Cosmic Falcon for donating this drawing to the wardrobe section!
Jem white corset Striped Dress (Clash in Jem disguise #2)
First appears in One Jem Too Many and again in: Beauty and the Rock Promoter.
Model sheet number Unknown
Hasbro did not produce this fashion.
Raya green patterned pantsuit
First appears in One Jem Too Many and again in: Mardi Gras, Britrock, Hollywood Jem Part 1, Video Wars, Beauty and the Rock Promoter, Homeland, Heartland, A Father Should Be....
Model sheet number Unknown
Hasbro did not produce this fashion.
Credits
Thanks to Cosmic Falcon for donating this drawing to the wardrobe section!
Jetta Purple/black/white ponytail outfit
First appears in One Jem Too Many and again in: Father's Day, Aztec Enchantment, The Stingers Hit Town Part 1, The Day the Music Died.
Model sheet number Unknown
Hasbro did not produce this fashion.
Clash white corset Striped Dress (Jem Disguise #2)
Makes its first and only appearance (on Clash, anyway) in One Jem Too Many.
Model sheet number Unknown
Hasbro did not produce this fashion.
Hollywood Jem
First appears in One Jem Too Many and again in: The Fan, Hollywood Jem Part 1, Hollywood Jem Part 2, Beauty and the Rock Promoter, The Day the Music Died, That Old Houdini Magic.
Model sheet number Unknown
Hasbro did not produce this fashion.
Integrity produced this fashion and doll

Also featured in this episode (debuted earlier in the series) are the following fashions, not including recaps:

Jerrica Boomerang Outfit
Rock 'n Roses She Makes an Impression (Jem) Shana Ruffled Blouse Pantsuit Jerrica Pink Power Suit It Takes A Lot
Jerrica Yellow Dress/Blue Cardigan 24 Carat Sound Splashes of Sound Broadway Magic (Jem) Jerrica Star Vest Raya Summer Shorts suit
Kimber Orange Boomerang Outfit Pizzazz French Lessons Roxy Rock Fashion Book Stormer Rock Fashion Book Jetta Orange Stripes/Purple Plaid Jem Original Outfit (Revised)
Pizzazz's Original outfit (Revised) Pizzazz "Rock Fashion Book" Danse Workout Gear Jem Workout Gear Aja Workout wear Permanent Wave
Shana "In Stitches"-style shirt dress Let's Not Forget the Past Pizzazz Designing Woman You Gotta Be Fast There Ain't Nobody Better Aja White/Black Diamond Blazer

Back To Jem Episode 29: Scandal
On To Jem Episode 31: The Bands Break Up