At the first scene of the intro sequence (the trees), wait for the text to appear and press A 7 times on the 2nd controller before the text stops. Start your game and you should be at level 2.
When you see the village appear on screen, press A 2x on Controller #2 and press Start on Controller #1 to get some bonus coins when you start the game. (This is all in the opening part of the game).
At the intro sequence, press Left and Right on the 2nd controller at the same time. This is impossible to do on a normal controller, but achievable on special Famicom controllers.