Your Grandma was created in A.D 23, not long after Mario was rehired by Nintendo, taking over from New Mario. This led New Mario to conquer the planet of Ninjatsu in the Teapot Galaxy, then created an army of Evil Burritos to destroy Nintendo, Your Grandma was one of these burritos. When the plan failed Your Grandma and the other burritos fled to earth and brainwashed peoples' parents into thinking she was one/both (Don't do it yourself kids *wink, wink*) of your parent's parents, or in some cases parent's parent's parent. Be wary kids she could attack at any second...