Will I get in trouble with Copyright?

Okay I for once made a YouTube account and I want to make my own cover picture and draw Minecraft and Pokemon characters and Mario Chracters. For example: Steve, Wolf, Endermen, Luigi, Mario, Charizard, Pikachu and other pokemon. I like both these things and I want to put it as my cover picture, So will I get in trouble?

Nope you are not violating copyright, since you just get the pictures on the internet, since you are not releasing it for business purposes, you are not violating anything. ^_^

No, its completely okay if you are doing this.

They're just pictures.

Most companies don't care about pictures unless you sell them for profit. Then That's making money off their material.

Nah! It's okay with this all!