I was on a really long car trip this weekend and found my gameboy, so I started playing it, and it had Munches Oddysee in it, I finished the game and got all the passwords, here they are.
Lv. 1 Meditation Site
NO PASSWORD
Lv. 2 Watchdogs
Zwz25gwZ
Lv. 3 Storm Circle
skpGPJbF
Lv. 4 Joining Again
B68Xhq5h
Lv. 5 The Gate
Fszq1PfG
Lv. 6 Shoot! Shoot!
FsxWgMcD
Lv. 7 Glukkon
Xjgs66L1
Lv. 8 Journey
FNVr6vxK
Lv. 9 Wind Hill
tjsFZjnC
Lv. 10 Independently
B6CSpBDc
Lv. 11 Sneaking
sPZsGz4S
Lv. 12 Battle of Steel
FjqOVRTs I'm not sure if that is a zero or an O
Lv. 13 Glockstar
s6FX2GLm
the Reward for getting an A+ rate on Quarma is a music player, here is it's code
THQMPMD1
enjoy