He never has called his Zanpakuto, and I've watched the entire series. It's unlikely to happen, and in his first fight with Ichigo, Kenpachi questioned why Ichigo and Zangetsu fought together, if I remember correctly
Kenpachi doesn't have a name for his zanpakuto. Therefore meaning he does not have a shikai. Cheers
No.
Kenpachi Zaraki
Ichigo zurosaki!!
Kenpachi Zaraki .
Unless he's learnt his Zanpakuto's name, no.
He defeated th previous 11th squad captain, the squad captain's name was never revealed. Maki and Kenpachi talk about it in the Bounto Arc.
Yachiru, like Kenpachi, doesn't have a Bankai since she doesn't know the name of her Zanpakuto.
Kenpachi Kiganjō was the 10th Kenpachi (Kenpachi Zaraki became the 11th) though I am not certain the exact date when this transfer of power happened. Prior to becoming the 10th Kenpachi and head of the 11th Division, Kiganjo was known as "Gosuke Kiganjō". He killed the 9th Kenpachi and 11th Division head 110 years prior to the start of the story, so Zaraki's ascension to power happened sometime after that point.
That character from the Bleach anime is called 'Zaraki Kenpachi', where 'Kenpachi is his first name and 'Zaraki' is his surname. Calling people by their first name is casual and not the usual polite Japanese way of speaking, thus he is called 'Zaraki Taichou' where 'taichou' means 'captain'.
Kenpachi has always wanted to fight byakuya. the first time they fight is when everyone thinks that Byakuya has turned on th shinigami and sided with the zanpakto instead and Kenpachi comes to fight Byakuya because everyone else is fighting zanpaktou. (anime: Zanpakto Alternate tale) the second time Kenpachi and Byakuya fight over who's going to kill/fight 10th espada Yammy. (anime: Fall of the Arrancar)
It's the absolutely adorable yachiru kusajishi :)