UltramasterBDJ´s self-made X-Codes/N64/Bomberman64
Bomberman64

access battle-bonus-arenas
882ac640:ffff
882ac641:ffff
882ac642:ffff
882ac643:ffff
882ac644:ffff
882ac645:ffff
882ac64f:ffff
882ac64e:ffff
e8604162:595c

ghost-mode player 1 [NOTE #1]
e86041ae:595b

ghost-mode player 3 [NOTE #1]
e8604123e:595c

have 20 bombs
e8604162:595c

power-bombs
e8801995:ffff

invincibility (still can move!)
e860415c:595b
e860415d:595b
e860415e:595b
e860415f:595b

zombi [NOTE #2]
e8604169:5959

Bomberman x2 [NOTE #3]
e8604134:0001

CPU in trouble
e860411f:595c

weired custom-settings in battle mode #1
882ac6a0:ffff
882ac6a1:ffff
882ac6a2:ffff
882ac6a3:ffff
882ac6a4:ffff
882ac6a5:ffff
882ac6ac:ffff
882ac6ad:ffff
882ac6ae:ffff
882ac6af:ffff
882ac6a6:ffff
882ac6a7:ffff

weired custom-settings in battle mode #2
882ac6a0:ffff
882ac6a1:ffff
882ac6a2:ffff
882ac6a3:ffff
882ac6a4:ffff
882ac6a5:ffff
882ac6ac:ffff
882ac6ad:ffff
882ac6ae:ffff
882ac6af:ffff
882ac6a6:ffff
882ac6a7:ffff
882ac6a8:ffff
882ac6a9:ffff
882ac6aa:ffff

weired custom-settings in battle mode #3
882ac6a0:ffff
882ac6a1:ffff
882ac6a2:ffff
882ac6a3:ffff
882ac6a4:ffff
882ac6a5:ffff
882ac6ac:ffff
882ac6ad:ffff
882ac6ae:ffff
882ac6af:ffff
882ac6a6:ffff
882ac6a7:ffff
882ac6a8:ffff
882ac6a9:ffff
882ac6aa:ffff
882ac6ab:ffff

level
8404a3db:000x

world
8404a3d7:000x

NOTE #1:
Player 1 / 3 is always a ghost - even in storymode. You cannot throw bombs, but now you can take controll of middle-bosses!!

NOTE #2:
After being killed, a Zombi-Bomberman remains and can be controlled for the few remaining seconds.

NOTE #3:
Sometimes a second (black) Bomberman can be seen in story-mode.