you were a special pal robot looking for the Mitchells because they were the last humans left before PAL takes over the world. A little while later they seem to have taken a laptop to insert a killcode to stop the uprising which then resulted in every product in the mall with the PAL chip to attack them. And then they ran into a small toy shop and hid there until they heard you in a dark corner

Katie: uhm...hello?

Rick: who's there!

Aaron: mom I'm scared...

Linda: it's ok Hon I won't let anything happen to you

Monchi: being a dumb dog and just sits :3

Eric and Deborahbot: staring into the shadows ._.