Rockman World 5

Mega Arm upgrade:
Intentionally lose all lives three times on the same level. Dr. Light will appear and upgrade the Mega Arm.

Enhanced weapon:
Collect all the jewels on the planets. Dr. Light will modify your weapons to use less energy.

Super password:
Enter the following password to possess all items and power-ups.

RRT__
ET_T
_E_RT
TTRRE
TRTRR

---

Status	Password
First four Bosses defeated	TTTET  _E_T_ ER_ _R T_ETR _E_ _R
At second set of bosses	RETE_ _ _T_E TET_T TTEET TTTER
No bosses defeated with all items	TRTRT EER_R TRRRT RRE_ _ ER_TR

출처 : http://www.gamewinners.com/game_boy/Megaman5.htm