It could be spaced correctly to make the dialogue more clear.

Very interested in your story.! Please continue!

Could you make more chapters please. I kind of like the idea of Zero being in the Remnant. I also like how he basically time traveled into the future. And since he started the Grimm I hope Dr. Weil makes an appearance. Or hell, even Omega Zero. That would be awesome

This is the start of a great story. However, i think zero is a little too human for a reploid. He may have the heart and soul of a human, but his reploid status gives him both physical prowess and mental analytical abilities. also, zero is the reserved type, and as far as i know, he never bragged about his exploits. He also had most of his memories back in 4, so his personality should have become even more reserved and quiet than before.

I like what I am reading, but maybe work on spacing paragraphs especially with dialogue. Another small issue is that you had Zero info dump his experiences to a class. Be careful with how you choose to have him reveal his life and battles. Maybe on a need to know like you did with Ciel and the Guardians. Or, if possible, have him be able to display his memories on a screen so that the RWBY characters can see what he experienced, especially when on the topic of the Guardians and Omega.

Till next chapter!

P.S.
Good job implementing the baby elves. Always wondered what happened to them. Looking forward to any other survivors.

P.P.S.
I am always looking for good Zero crossovers because they are rare and most writers forget the Zero games so very good job taking a step in a direction many don't realize is a good option for crossover material.

Dude, all I have to say is to put more periods in your sentences. It makes the story move a lot smoother if the paragraphs aren't never ending sentences. Other than that you have a story to build here!

Interesting story keep it up

good writing, no bad grammar, zero is not so Over powered that he can 1v1 ozpin like he was a tooth pick, I'm starved to death finding a good megaman zero fanfic...
good enough for me, more please