Okay, this one could go a billion different ways.

Here's a few of them:

1. I could say some crossovers shouldn't exist because they're bad ideas. Ex: A writer I know dislikes the idea of DBZ/DBS crossovers, because that universe feels like it has an entirely different scale of power.

2. I could say that a lot of crossovers are clearly reaching for views. Ex: Gamer/DXD/RWBY/DBZ/BNHA story, and yes, it exists. The story I'm thinking about has over 900K reads, I think.

3. I could say they just shouldn't be done at all.

But, I'm actually gonna tell you none of those!

Dragon Ball Z crossovers can be done well. TheSpectre21 has done them absolutely phenomenally, or at least in I way that I enjoy them.

Even stories that are really pushing it, like the Gamer/DXD/RWBY/DBZ/BNHA. It could've been good, genuinely.

I didn't read it, but that doesn't mean it's bad.

"So PyroSaiyan, this chapter hasn't been funny at all! Why did you even publish this one?"

To say this:

Crossovers can be good on one basic rule.

Don't assume your reader knows the series you're talking about. Even if it's Naruto and DBZ, which are both very well known, assuming that your reader knows what you're talking about is a bad idea.

"But why? Why would they even read a story that they know nothing about?"

I dunno, but I did it.

DXD and RWBY were both series that I never watched past the first episode of, but I read stories (Neglected and Abused to be honest) about both of them, despite never having watched them.

When writers introduced team RWBY, I felt more cozy. I didn't know what they looked like, or their backstories, I knew what was told to me. 

It's hard sometimes, and is honestly a drag when you just want to get on with the story, but have to introduce characters that should be obvious to your readers.

However, by introducing characters you can do two things.

1. Introduce new readers to the series you're writing about.

2. Change the past and future of characters.

If you wrote that Ruby Rose had violent tendencies as a child, guess what, she did. At that point, shaping and shifting her into a character that's abusive and borderline villainous is believable.

Shifting her from the original story, a happy-go-lucky girl that just wants be a Huntsman into that though? That's where the problem in those stories lie.

So yeah, don't treat your readers like they're stupid, but don't assume they know everything either. When you do that, you can get a lot of good moments that are built up from the bottom up.

If a story has a bad beginning, who's gonna read 100 chapters for it to finally start getting good?

Until another lesson, Toodles.