Mrs burnes

Talks to her on the phone, a younger version is seen in the Springfield bowl episode.
Just to clarify we are talking about his mother right?

Yeah that one in the wheelchair and Larry burnes to complete the burnes family

Old lady Burns, yep I remember seeing her. In an older episode I think.

In fact all the Burns characters should be in the game. Even child Burns as a character, with the lollypop, I think its from the Bobo Episode.

and she has to be voiced....

"that improvident lackwit! Always too busy stridin' about his atom mill to call his own mother. I'll give him what-fors 'til he cries brassafrax."