Boochi is a special event pet that was only available for a limited time during a specific event. It's not possible to find or obtain Boochi in the regular game anymore.
Here's what happened with Boochi:
* Boochi was released during the "Boochi's Big Boo Bash" event in 2015.
* This event was time-limited and ended in 2015.
* Since then, Boochi has been unavailable in the game.
So, even if you're really hoping for a Boochi pet, unfortunately, it's not possible to encounter one in the game anymore!
You might be able to see Boochi in the hands of other players, but you won't be able to get one for yourself.