Motahareh, the phrase "I wish you happy" is incorrect and ungrammatical, but a few similar phrases are fine. Moreover, saying "I wish you joy" is fine too. Alternatively, you could try saying one of the following: 1. I wish you happiness. 2. I wish you much happiness. 3. I hope that you'll be happy.

Yes the first one is incorrect, happy is a verb, you need to use the noun here which is happiness. I wish you happiness

You can say : I wish you all the best

Remember the Whitney Houston song from the movie "The Bodyguard". The words " I wish you joy and happiness...