The significance of Teenage Mutant Ninja Turtles Adventures #23 (1991, Archie Comics) is primarily as a key issue for the first comic appearance of a fan-favorite character from the franchise's popular toy line and animated series.

Here is a breakdown of its importance and collectibility:

🐢 Key Significance of TMNT Adventures #23

1. First Comic Appearance of Slash

This is the key reason for the book's value. Issue #23 features the first comic book appearance of Slash, the villainous, anti-social mutant turtle.

* Character Details: Slash was a popular character in the Playmates toy line and the TMNT animated series before appearing in the Archie comics. In the comic, he is introduced as a mentally unstable mutant from the garbage planet Morbus, obsessed with palm trees, and quickly manipulated by Krang to serve as a minion.

* Collectibility Driver: As a first appearance of a prominent, unique villain in the TMNT universe, this issue holds significant appeal for collectors of both TMNT Adventures and overall franchise keys.

2. Continuation of Krang's Plot

The issue is also significant for advancing the story of the exiled villain Krang, who is attempting to orchestrate his return from Morbus (the toxic garbage planet) and finds an unexpected ally in Slash.

3. Bronze/Copper Age Era

Published in 1991, this issue falls into the late Copper Age/early Modern Age of comics and is part of the long-running TMNT Adventures series published by Archie Comics. This series gained a strong following for separating itself from the tone of the animated show and often delving into more serious themes and extended storylines.