My apple I'd shows the wrong email. How do I change it?

To update apps you have to sign into the account that purchased them. That message indicates that either your iPod is not signed into the account that purchased the apps (Settings>Store to sign out and in) or that you have apps purchased from more than one account that need updating. In that case you have to update them one at a time until all the remain apps that need updating were purchased from one account.

i have an ipad mini i typed in the wrong email and fixed it but, when i go to install a game the wrong email pops up how do i change this?

Go to Settings>iTunes and App Store and sign out and sign in with the other ID.