Stage 1: After the fourth wall on the right.
Stage 2: None
Stage 3: After the thirth mountain on the right.
Stage 4: Left before the fourth kreek.
Stage 5: After the thirth wall on the right.
Stage 6: Before the fifth river on the right.
Stage 7: Fifth plateau on the left
Stage 8: None and after that there are no more sightings reported.
Press Select + Y + Left+ Right at title screen and keep them pressed until the game begins. From now on, press Select to become invisible.
With one of the Konami Game Master cartridges in slot1 and the game in slot2 you can use the Game Master to start at a higher level and/or with more lives.