The sounds i upload are to low and whenever i fight the opponent's sound is too loud and no one can here my own sound Are there anyway to increase the volume of it

Hey, you can just alter the audio and make it louder.
I altered the audio for you, you can download the file type down below.
Download

Hey Thanks Bro
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Tutorial pls?

You can alter you own audio by downloading a video editing program.
If you want something free, I suggest you download Window Movie Maker, or Fantashow if you own a Mac.
This is simple, I don't think you require any tutorial about audio editing, the programs mentioned are basic for your understanding.
If you have any doubt, you can always ask Mr.Google, he will help you out with anything you don't understand.

Thanks man

It's Easier if you just download Audacity. It's MADE for editing sounds. You can amplify the sounds, speed them up, make them sound demonic, robotic and more!

Just type Audacity on google and it's the first one up