It was an animated show a few years ago and it went like this.
There was a boy and girl and a robot pteradactyl and they need to go back in time to save these little creatures. once the creature was saved the pteradactyl would wipe the memory clean of the people from the past. the creatures were about less than a foot tall and had special gifts. im sorry i can't say more but i was young.
One of the creatures looked like a pumpkin and was at some haunted house.
I thaught i could post it here since this also about time travel