Biologically all tetrapods have two arms and two legs. Bears, lizards, birds etc. However, a hand is prehensile appendage at the end of a forelimb, so apes and monkeys. That said, given the dexterity of bear forepaws and their use of them to manipulate food and objects, I would say a bear's forepaw does not count as a simple foot like perhaps the hoof of a horse or foot of an elephant does.