Question

1°: if you have a spiky-ear pichu and a shiny pichu and you breed them (1 of the pichu's are japanese or from other country) what will it be? spiky or shiny?

Answer 1

1. You can't breed spiky-eared Pichu or shiny Pichu. They're baby Pokemon.
2. Spiky-eared Pichu can't be shiny.

Comments

Spikey Eared Pichu can't be Shiny.

---

"Shiny sprites for Spiky-eared Pichu exist in the coding of the games, although it is impossible to obtain due to the game assigning the Spiky-eared Pichu a fixed personality value that is predetermined according to the Trainer ID number and secret ID. This ensures that the personality value will never result in a Shiny nor a male Spiky-eared Pichu."
http://bulbapedia.bulbagarden.net/wiki/Spiky-eared_Pichu#In_the_games

---

So it exists in coding, but it is impossible to obtain.

---

Actually according to the Musada method, there is now a 1 in 2048 chance that you will breed a shiny, (assuming you evolve your pichu into pikachu, otherwise you cannot breed) - not spiky eared, that is.