Ending
Note that Dr. Light is known as “Dr. Right” in Mega Man III, unlike in other Mega Man games. The list of old robots during the credits features a few more details in Japanese than in English, only because it generlaly takes twice as many characters to write something in English than in Japanese.
Image Comparisons (16 sets)

Japanese release

English release

Japanese release

English release

Japanese release

English release

Japanese release

English release

Character called “Blues”

Character called “Proto Man”

Japanese release

English release

Japanese release

English release

Japanese release

English release

Japanese release

English release

Japanese release

English release

Japanese release

English release

Japanese release

English release

Japanese release

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Japanese release

English release

Character called “Blues”, not identified as Rockman’s brother

Character called “Proto Man”, claimed to be Mega Man’s brother

Japanese release

English release
Ok. Translate them ? 🙂
These research & data galleries are mostly uncurated and unorganized, so translating everything goes beyond the scope of what they’re for. I do point out when text is significantly different when I can, though, otherwise the original text probably isn’t noteworthy enough to mention.