I have the Chuck E Cheese:Rat Tales comic book.
Here's the song that Chuck E Cheese sings to unplug Megachip.
Just because i'm kind of gentle,
don't be so mean to baby,
'cause baby's been so good to you!
Could you go and leave me crying, without even trying?
You must be made of stone, don't be cruel to baby!
Think the whole world of me,then turn around and say we're through.
Don't be so mean to baby!
And at the end of Chuck E's song,everyone except the Warbelettes and Chuck E say "Chuck E! Shut Up already!"
I printed out the full comic on Showbizpizza.com. It is from 1979.