Baku is a pig Yo-Kai.
Soultimate-Sleepy Smoke.
In the anime, Nate befriends Baku in episode 19, after he uses Shogunyan, and Shogunyan, is put to sleep by Baku's sleep smoke, and Baku eats his dream. The only time so far that Nate has used Baku, is when he was trying to befriend Insomi. In the game, you befriend Baku whenever you are trying to get your Yo-Kai Watch upgraded. You will have to fight Baku before you will befriend it.
Thank you guys, so much for reading, and the next part will be about, Dazzabel.
Like I say at the end of all the chapters, if you want to battle, just hit that vote button, message me your friend code, and then we can battle.
(Hint: I will be using a Dragon Lord, Blizzara, and a Frostial).