Teenage Mutant Ninja Turtles (NES)

The NES Teenage Mutant Ninja Turtles was one of Konami's first games starring everyone's favorite heroes in a half shell, released during the TV show's second season. It is a side-scrolling platform game with overhead hub segments where the player can control any of the four Turtles at any time. Unfortunately, its poor character balance (particularly the fact that Mike and Raph had pitiful attack range compared to Leo and Don), questionable faithfulness to its source material (with many strange enemy characters that never appeared on the show), and the fact that it was released in the shadow of its more popular arcade cousin all led to the game being considered something of a mild disappointment.

Bebop/Rocksteady Flinching


Unused animation frames for Rocksteady and Bebop in what seems to be a flinching state, similar to Shredder's. These, however, go unused because neither Bebop or Rocksteady flinch from anything.

Mini Technodrome


Graphics for a miniature Technodrome with two frames of animation. It is grouped with the graphics for the enemies that appear inside the Technodrome, possibly hinting that it might have been an enemy, but was eventually scrapped.

Thanks


Grouped with the graphics for Area 3's boss and captive Splinter is a rough speech bubble reading "THANKS", but no character ever says this.

Heart


During the ending sequence, the game loads a heart symbol, which is only displayed in the Japanese ending text. The heart was slightly modified to look less stretched in the international releases, but the ending never uses it.

Regional Differences
For some reason, Konami decided to localize the first Turtles game for the Famicom in Japan, despite the fact that neither the TV show nor the comics had yet been adapted for the Japanese market at the time. As a result, the game was retitled Geki Kame Ninja Den, which loosely means "Legend of the Radical Ninja Turtles", affecting the numbering of future Turtles games on the Famicom, which kept the English name of the franchise. In Europe, the game (and the franchise itself) is titled Teenage Mutant Hero Turtles, due to a law in the U.K. at the time that forbade the sales of products with the word "ninja" in their name to children.

The Japanese version of the game is substantially identical to the American and European releases, aside from the text. One particular liberty that the Japanese localization took was the fact that April addresses Splinter as otōsan (father)...not because of any local custom or formality, but simply because they decided to turn April into Splinter's daughter.