Giant Cucco
Go to the house where you gave Malon the Cuccodex. Keep hitting an adult Cucco until a flock of Cuccos appears. Use a Mystery Seed on the original Cucco and it will turn big. If you keep hitting the big Cucco, he will chase after you.
Hero's Cave: Gasha Seed
Enter Hero's Cave and go east, then south, and push the northwest block. A stairway will appear. Go down it, and a Gasha Seed will be there.
Hidden room
After getting the Rod Of Seasons, go into the waterfall in front of you and press Up.
Legend Of Zelda, The: Oracle Of Seasons Cheats.
Hidden shop
Play the game in a Game Boy Advance. Go to Horon Village and find the locked door next to the Target Aim mini-game. It can now be opened, allowing access to a shop that sells all items for 100 rupees. In the shop, you can buy a Ring that is appraised to be the GBA Nature Ring. It is described as "Life Advanced!" in its information.
Jewels
There are four jewels to find. In a regular, unlinked, (not secrets game), the four jewels are in the following locations:
Go in front of Dancing Dragons Den (level 4). In the upper right-hand corner, dive into the water and enter a secret cave. The jewel is at the end of the cave. You need a slingshot and Mystery and Ember Seeds. Go below Hero's Cave. Use the Slingshot to light the torch. Go on the bridge and shoot a Mystery Seed at the question mark. Kill the Ferret-looking thing and get the jewel. Get the first five Essences. There is a place in Holodrom Plain that will give you a jewel if you have the five Essences. The place is several screens south of where you find Ricky. Go to the stump in front of Poison Moth's Lair. Change the season to Winter. Go to the screen below and to the right of where the Heart Piece is located. The jewel should be inside the cave.
Maku Tree
The Maku Tree slowly develops as you proceed through the game. It will change after each essence. The first makes it slightly bigger. The second makes it take half the screen and have a doorway. The third opens a stairway in the back of inside that leads to a doorway outside of the tree (second floor) -- it contains a Gasha Seed. The fourth makes the second floor have a room, but nothing really in it except for water in the corners and center and two bushes. The fifth puts some vines on the second floor walkway outside leading to the third floor. It is just a one space spot now. The sixth opens a walkway on the third floor, but no door. The seventh seems to have no effect. The eighth opens a doorway on the third floor. Inside, it is just like the second floor, only there are three bushes instead of two.
Noble Sword
Go to the Lost Woods, change the season to Winter, then go left. Change the season to Fall, then go left. Change the season to Spring, then go left. Change the season to Summer, then go left. You should find the Noble Sword. When you have full hearts, you can shoot energy beams from the sword.