To get this, first buy a miracle potion and a medicine. Go to your cow and give it the miracle potion, then IMMEDIATELY give it the cow medicine. The cow will get pregnant, and in only 3 days you will have a baby cow(instead of the usual season!)
Instant EndingThis is easy, it is a good indicator to tell how you are doing in the game! Don't do this code if you want the endings to be a suprise! To do this, when you go to sleep at night, when the screen goes black, hold R, L, Start and Select(at the SAME time) and it will show you the endings you would get!
Bell TreeThis isn't a secret, but you could easily pass this over if you don't want to spend money. In the winter, a peddler will come to your house saying he wants to sell you a money tree for only 20,000G. Buy it(only if you have a lot of money) and although it isn't a money tree, it is a bell tree! Instead of having to use the hand bell to get all your cows inside at night, it calls them instead!
Magic BeanstalkDuring your second fall, sell one of your cows. When you bring your cow to the selling area, a guy will come asking to trade your cow for a magic bean! Trade and plant the bean on the summit and a magic beanstalk will appear. Climb up the beanstalk and you will receive a GOLDEN chicken! You will then be transported mysteriously to the peddler in town and you'll sell the chicken for 10,000G!(much more money than selling your cow to the livestock owner!)