Do they have SpongeBob characters anymore?

Yes

I didn't see any here, but then again I wasn't in the kids section for very long.They do have SpongeBob souvenirs.

Yes, the cast of Spongebob Square Pants still make appearances. They will usually appear the kid friendly area. If you get the theme park map when you first walk in, it will state when and where you can meet the character.

I didn't see any. But they have different characters for different times of the day/week.

Yes. It's close to the ET ride