Mostly Unpublished NES Cheats ;)

red    marked cheats are unique, not listed on any site (tell me if not).
brown marked cheats from various other sources like gamefaqs.com etc, checked and fixed if necessary.
gray   marked disabled or missed cheats buried inside game ROM.

  Xevious
  Xi Tian Qu Jing II (Journey to the West II)(Waixing)
  Xian Jian Qi Xia Zhuan (Nanjing)
  Xiao Au Jiang Wu (Nanjing)
  Xiao Ma Li, Bingo

Cheats summary:

generic cheats	-	0
unique cheats	-	6
buried secrets	-	1
fixed generic cheats	-	0
unverified games	-	0
games with secrets	-	5
games with no secrets found	-	4

Xevious

All versions:

(BUR) Hidden text (added 26.12.11):
The RESET routine in this game uses string

Kei Cross

to check if game was soft or hard reset. Additionally, there are a generic Namco copyrigh text inside all regional versions:

TM AND COPYRIGHT 1982 1988 NAMCO LTD.

for the European Version, and

COPYRIGHT 1983 1984 NAMCO LTD. ALL RIGHTS RESERVED

for Japanese and for the US versions. Also there is a hidden credits message identical for all regions:

  MAIN: KEI CROSS
 SOUND: UHOHOY OHNOGI
ASSIST: EVEZOO END & HAL UDAGAWA
TESTER: SHIDASHI YAMAMO

Japanese version:

(UNI) Debug mode (added 06.10.07):
At the title screen, on controller 2 hold A or B and press Right, Right, Right, Right, Right, Right, Right, Right, Right, Up, Up, Left, Left, Down, Down, Down, Down, Down, Down, Down, Down, Down. At right top screen corner appears numbers line. By pressing Left or Right on controller 2 you can select one of 8 digits, and by pressing A or B switch it to 0 or 1. Then press Reset to apply effects. The table above describe all these bits meaning. Bits are numerated from left to right, from 0 to 7. Note, the cheat sequence still present in all regional versions and can be entered, but the actual debug routine complete removed from all western versions, so it can't be used or re-enabled.

bit 0	-	Invincibility "0" - off "1" - on
bits 1-3	-	Extra lives score range "000" - 20k first, 60k onward "001" - 20k first, 50k onward "010" - 20k first, 80k onward "011" - 30k first, 80k onward "100" - 30k first, 120k onward "101" - 40k first, 80k onward "110" - 40k first, 100k onward "111" - 50k first, 150k onward
bits 4-5	-	Starting lives "00" - 3 lives "01" - 1 lives "10" - 2 lives "11" - 5 lives
bits 6-7	-	Difficult level "00" - normal "01" - easy "10" - hard "11" - very hard

Xi Tian Qu Jing II (Journey to the West II)(Waixing)

(UNI) Stage select (added 23.05.15):
At the title screen, select the number of players, press Start once, then enter Left, Up, Right, Down, B, B, B, B.

Xian Jian Qi Xia Zhuan (Nanjing)

(UNI) Secret message (added 21.05.14):
During the game, while in conversation mode, hold Up + Select + Start on controller 1 and skip with A to the end of the dialog. The copyrigh string will be displayed in the dialog box. This cheat can be found in a couple of Nanjing games on the same engine.

Xiao Au Jiang Wu (Nanjing)

(UNI) Easter egg (added 02.01.09):
Start a new game. When the intro is over, stand on the stage, just above or to the left/right of the table, so when you move in any direction, you won't leave the stage area. Now, press Up, Up, Down, Down, Left, Left, Right, Right, A, push every button slowly, with pauses between them. This code, however, can be enterd the same way in any place of the town, just outside the starting room.

Xiao Ma Li, Bingo

(UNI) Extra 5000 credits:
Press Up once and Select once in any order then Start at the title screen.

(UNI) Ending sequence:
Press once each of the following buttons Up, A, B, Select in any order then Start at the title screen.