This takes a bit of practice but the rewards are great. 200 Hassy Drinks in the Japanese Version Successfully complete and save the game. This should allow the game to be played with near-invincibility, and the additional bonus of not having to buy any other health items. Additionally, any money left from the last game will also be available in the new game. If you wait to use Eliot's ATM card until the date changes to December 25th there will be more money in his account because it's his payday.
Big eyes Beat the game twice on middle level, and once on hard.
Then you will get big eyes mode, and you will still have the ray gun. During the game there is a part where you get the sega game token, play jungle hunter, and win the gaily doll. Go to the room where there is a Goro looking creature. Behind it there are going to be 2 mutated bats. Kill them and get behind the box where the bats were you will find the metal bat and a big hassy next to it.