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1. Good Boy, Little Pest by Abbie_Lauren2024

   Fandoms: Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Teenage Mutant Ninja Turtles - All Media Types  

   • Mature
   • Graphic Depictions Of Violence
   • No category
   • Work in Progress

   19 Dec 2025

   Tags

   • Graphic Depictions Of Violence
   • Kraang Prime & Leonardo (TMNT)
   • Donatello & Leonardo & Michelangelo & Raphael (TMNT)
   • Señor Hueso & Leonardo (TMNT)
   • Agent John Bishop & Leonardo (TMNT)
   • Leonardo (TMNT)
   • Donatello (TMNT)
   • Raphael (TMNT)
   • Michelangelo (TMNT)
   • Kraang Prime (TMNT)
   • April O'Neil (TMNT)
   • Splinter (TMNT)
   • Baron Draxum (TMNT)
   • Casey Jones (TMNT)
   • Señor Hueso (TMNT)
   • Agent John Bishop (TMNT)
   • The Earth Protection Force (TMNT)
   • Leonardo-centric (TMNT)
   • Hurt Leonardo (TMNT)
   • Donatello and Leonardo are Twins (TMNT)
   • Feral Leonardo (TMNT)
   • Leonardo Needs a Hug (TMNT)
   • Protective Leonardo (TMNT)
   • Good Sibling Donatello (TMNT)
   • Protective Donatello (TMNT)
   • Protective Raphael (TMNT)
   • Good Sibling Raphael (TMNT)
   • Good Sibling Michelangelo (TMNT)
   • Protective Michelangelo (TMNT)
   • Disaster Twins Donatello and Leonardo (TMNT)
   • Leonardo Angst (TMNT)
   • Hurt/Comfort
   • Angst with a Happy Ending
   • Eventual Happy Ending
   • Heavy Angst
   • Physical Abuse
   • Emotional/Psychological Abuse
   • Dissociative Identity Disorder
   • Feral Behavior
   • Self-Harm
   • Uncle Señor Hueso (TMNT)
   • Protective Señor Hueso (TMNT)
   • Post-Krang Invasion (TMNT 2018)
   • Post-Movie: Rise of the Teenage Mutant Ninja Turtles (2022)
   • Other Additional Tags to Be Added
   • read the tags
   • Suicidal Thoughts
   • Psychological Torture
   • Aftermath of Torture
   • Past Torture
   • Medical Experimentation
   • Medical Procedures
   • Medical Trauma

   Summary

   After Leo is saved from the Prison Dimension, his brothers quickly realize that more happened than they had realized. Leo would get random bouts of feral bewilderment and had random triggers that had not been there before. What had happened to him?

   ---

   Gaichū doesn’t understand what happened. One moment he was in his home, running away from a beating from Master and the next… well… the next he found himself in a strange new world surrounded by new enemies who seem to know him. Now he has to learn to navigate the peculiarities of this new place and hope Master won’t find him.

   Peculiarities such as gravity.

   And light.

   Language:

   English

   Words:

   124,386

   Chapters:

   59/?

   Comments:

   1,301

   Kudos:

   524

   Bookmarks:

   67

   Hits:

   13,835