Healing on Endor: In the Endor Bunker level, fall down the moving platforms 3 times. Fall to the left and you'll land on a platform. Kill the droid and walk until you find a heart. It will restore your health completely.

More Lives:

In the second level hit pause and push A, A, B, B, B, Up, Down then unpause and you will gain 10 lives.

Passwords:

snkmtd Dance Hall
rwvjbc Sail Barge
tfgbmn Endor
hjmkpl Ewok Village
qgthgd Power Generator
psvzkl Death Star
sfpysw Tower
kfgzxq Death: Mission