Do you have shuttle bus

Yes they do. It runs every 20 mins, 24 hrs a day.😎

Yes there is a shuttle that takes you to and from the hotel it runs 24 hours every 20 minutes

Yes

From what I know there is a shutter buff to the convention during E3 and Anime Expo, not sure about the other conventions, but I believe they do due ti being close to the convention. The bus runs for 24 hours, and passes every 20 minutes. If you walk it, it should take you 30 or less minutes

There was a shuttle to and from the convention center for AX, but I'm not sure if other conventions will be the same.

The convention I went to had a shuttle to and from the convention center.

I think they don't