The first one is a better Yu-Gi-Oh that I saw in Feilu. Judai is the protagonist, and Sister You is also there all the time. It has a system.
The second one I found when I was free and looking for fellow Lao Gun fans. It's an old book and the writing is very good, but it's not the fast food type you get nowadays. You have to be patient to read it.
The third book is a Pokémon fanfic about Chi Ye. The setting is semi-original. It's about having a harem. It's pretty good.
The fourth one I read in Naruto is pretty good, but there are some poisonous spots in the middle, so it's still acceptable.
The fifth book is a Naruto fanfic with a lot of imagination. It is very interesting to go through various time travels. It seems that the author intends to make up for the regrets, but the update is a bit slow.