Lemmings & Oh No! More Lemmings

Lemmings & Oh No! More Lemmings is a fairly rough Game Boy Color port of the first Lemmings game and its expansion pack, featuring an entirely original (worse) soundtrack which would inexplicably go on to be used in a string of bootleg platform games by the unlicensed developer Sintax.

This was also the last time the series would appear on a Nintendo console, being released shortly before Psygnosis was absorbed into Sony Computer Entertainment Europe.

Development Tool Text
This game contains similar text to Animal Breeder 3 (from the same developer), left over from some kind of development tool.

VS Mode
The Japanese version features a VS Mode, where players compete via link cable to be the first to complete a level, but for some reason the option was removed from the US release.

However, the mode is still present, still fully functional, and was even (sort of) translated to English!

You can access it in the US version using the GameShark/Action Replay code (which will force VS Mode selection on the title screen).

Menu
The level selection menu was already in English in the Japanese version, but had a spelling mistake which was corrected. The unusual "r" in "Normal Game" was also modified to something a bit more standard-looking.

Header
The Japanese internal cart header gives the game's name as. This was fixed in the US version.

Level Names
The Japanese version has a number of typos in level names, which were mostly fixed for the US version:

One that was toned down:

A couple which featured typos in the Japanese version but were changed outright in the US one, possibly due to their reliance on a British reference (the sitcom Only Fools and Horses) and a Coca-Cola trademark (the juice drink 5 Alive) respectively:

And one named in romanized Japanese in the original, misspelled in romanized Japanese by the Japanese developers of the GBC port, then "helpfully" translated back into English by the US localizers: