Monster card duplicate of Carl, deliberately left on the previous floor because it messed with everyone's head.
Puzzling over the fact that both the split ogre strongmen and the Nodling they came from are walking around at the same time, Carl compares the situation to the Alpha Carl card from the previous floor. Two copies of the same creature existing at once has to be confusing for everybody involved, and he admits it certainly messed with his head. He is openly glad they left the Alpha Carl card behind on the last floor rather than bringing that particular strangeness into Fupa with them.
A duplicate of Carl summonable from a monster card.
Past duplicate of Carl, invoked as the benchmark for how disturbing dungeon copies are.
Also appears in books you've already read — spoiler-safe to their endings: