YOU SAID:

Eggdog becomes something new and also old at the same time.

INTO JAPANESE

エッグドッグは新しいものになると同時に古いものにもなります。

BACK INTO ENGLISH

The Egg Dog becomes old as well as new.

INTO JAPANESE

エッグドッグは新しくも古くもなります。

BACK INTO ENGLISH

Egg Dog can be both new and old.

INTO JAPANESE

エッグドッグは新旧どちらでも構いません。

BACK INTO ENGLISH

Egg dogs can be old or new.

INTO JAPANESE

エッグドッグは古いものでも新しいものでもかまいません。

BACK INTO ENGLISH

Egg dogs can be old or new.