YOU SAID:

the dog was found inside the wall

INTO JAPANESE

その犬は壁の中で見つかった

BACK INTO ENGLISH

The dog was found in the wall.

INTO JAPANESE

犬は壁で見つかりました。

BACK INTO ENGLISH

The dog was found on the wall.

INTO JAPANESE

犬は壁で見つかりました。

BACK INTO ENGLISH

The dog was found on the wall.