Splicer is Splinter's more science-minded brother, in the comic Teen Techno Turtle Trio Plus One!. Splicer attempts to start his own band of mutantTurtles, but forgets the names he's given them and can't even keep them straight after color-coordinating (as it's a black and white comic) and weapon assignment. He takes them to train on the Dinosaur Peninsula, where they are stopped by Pteranoman due to the peninsula's strict "no-science" restrictions. Splicer's Turtles then turn out to be humans in costumes, and the realTMNT show up and attack. Splinter has come with them, and Splicer offers his brother a ride back home. Splinter says that he doesn't need one since it's a peninsula.
Since Don Simpson never signed any work-for-hire contracts regarding Teen Techno Turtle Trio Plus One!, he believes that he owns the characters of Splicer and the Alternate Turtles.