Here is a hack for Battle City which changes all the levels in the game.
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Thank you for downloading the patch file!
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Language? English.
?? ?????? 1.0?Դϴ?.
This is version 1.0.
Battle City (J).nes - NOINTRO
CRC32: F599A07E
MD5: CD4FE2E78DF0696DBE652F02C19541A1
SHA-1: E1061C9241B06A965FB7845CB951D921ACA010EF
SHA-256: A869AEAD5B6957FC62002FF9636E048CC34BAF0100D629B07DC51AA18F220C0C