There are Bleach games, where Ichigo is in them. He is the main character afterall.

He originates from manga/anime, though, just like Gandalf originates from the books/movies. Also, Yomiko Readman (1st round eliminated, my personal nomination for this tourny) hasn't been in any videogames. The criteria for characters this time around was that they could be from any video game or anime. They often overlap.