To get Kuchipatchi raise your bonding to 80-100% while using the last item out of the three. (Sometimes Crayons) Raise your bonding to 100% and use the dating show. If you are offered a Yoneapatchi select marry
You will then get a Kuchipa family. Here are some extras:
To get Kuchipatchi on V4 raise your flower skill points to 150, make sure that all of your skill points added up equal 450. If you get more skill points your tamagotchi will turn into another tamagotchi that I do not know the name of.
On the dating show on the V5 if you are not getting Yoneapatchi just set the time to 6:59AM and wait one minute. Do this as much as you want till you get Yoneapatchi as a mate. Here are some other how tos for familys:
Mametchi+Chantotchi=Mame Family (all of these familys MUST have 100% bonding)
Memetchi+Mumutchi=Meme family (Ive heard some fans that Sukatchi also works but I don't think you should try it because it could end up as a Cheerful family
Violechi+Sukatchi=Violet family
These will not work the other way for instance:
Chantotchi+Mametchi
PS Forgive if I made spelling mistakes