Mega Man 4 (Gameboy)

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After Dr. Wiley's tank

Enter the following password, where r = Rush, b = Beat, and f = Fliptop.

RREBB|r
RR BR|f
EBBREE|B
RE R B|

Dr. Wiley

Enter the following password, where r = Rush, b = Beat, and f = Fliptop.

EREEE |b|
BRE BE|f|
EER R |B|
BRBEB | |

Four weapons

Enter the following password, where r = Rush, b = Beat, and f = Fliptop.

EBEE|r
BRRR E|E
EB E |b
EBERB|

Get Beat

Collect the letters B, E, A, and T.

Go to Dr. Wiley after the second set of four robots

Collect the letters W, I, L, and Y.

Mega Buster boost

Intentionally lose all lives three times on the same level. Dr. Light will appear and boost the Mega Buster.

Near end

Enter the following password, where r = Rush, b = Beat, and f = Fliptop.

BBEBR |R|
R RE|f|
BEB EB|b|
BBBBR| |