Levels 3-1, 6-2, and 9-2 have bonus rooms that contain a large amount of power-ups.
there is an invisible staircase leading to Dracula, and a pit below it on the level just before dracula is encountered. Take a large jump into the pit from the edge to land on an invisible platform. Move to the left side to reach a staircase that leads downward. Before going down, move all the way to the left to find some power-ups. Collect 99 hearts, a triple boomerang, and the best whip, then carefully return to the stairs to enter the next level.
Level 9 Treasure Chest
Jump 255 times on any treasure chest on level 9 for a power-up.
After you defeat Dracula the first time, you will see the ending cinematic, followed by credits, then a cinematic of Simon fighting all the bosses. At the end where it reads "presented by Konami" press Start. You will be at the beginning of the game again, however this time therea re more of each enemy, but Boss fights are the same.