Happy Items:
By putting your tamagotchi in certain specialized circumstances, on purpose or accidentally, you have the possibility of unlocking seven happy items. After each item is found another circle is filled on the bottom of the first screen of the happy meter with a picture of the event. Your happy bar is also extended. When you have gotten all of the happy items your happy bar will look like this:
You start with only one section of the happy bar. This makes your tamagotchi more vulnerable to bad care because the happy bar is shorter. The happy items are:
Rainbow
Shooting Star
Four-Leaf Clover
Winner Popsicle Stick
Upright Tea Leaf
Heart-Shaped Cloud
HapiHapitchi Visit
The rainbow can be obtained by using the purple watering can on a tree (it doesn't matter which stage) on a sunny day. You get the purple watering can by winning the raffle/lottery. To get a ticket, you must buy something. When you buy something from the normal store you get one ticket and when you buy something from the Tama Depa you get three. This may take a very long time and you may have to enter the lottery many times, but don't give up! It's worth it! Once you have it you may also have to use it on the plant several times to get it to work.
To get the shooting star you must buy the telescope at the store and use it on a clear night. (If you can see the stars and it's not raining, it's a clear night.) You might have to use it several times.
The four leaf clover can be found by using the magnifying glass on your tree on a sunny day. You may have to repeat this several times. It works with any stage of tree.
The winner popsicle stick is unlocked when your tamagotchi is unhappy and you give it the blue popsicle/ ice lolly. This works best when your tamagotchi is very unhappy such as after it discovers it has grown a worm or poop tree. You may have to give it the blue popsicle many times, but don't keep doing it after your tama is happy because it might get a toothache.
The upright tea leaf is the same as the winner popsicle stick so follow the instructions above.
The heart shaped cloud is found by going outside on a clear day. (To go outside, press the B button when in the living room.) You may have to do this several times.
To get the HapiHapitchi visit, you must grow a HapiHapi tree from the HapiHapi seeds. These can be purchased at the store. Then grow the tree like the mystery tree and when it is done, the HapiHapi fruit will be in your items. Now eat the HapiHapi fruit and HapiHapitchi will come to visit.
All the happy items are lost when your tamagotchi has a baby but you will still have the items such as the purple watering can, telescope, and HapiHapi fruit. You will however have to go through the processes again.