suggestions
durracell battery:
rolls toward you
shoots radio wave projectiles
when it get close to player it gets in a ^90. angle and falls on you
wall-e:
attacks with its arms
can morph into ammo box(disquiese)
can roll fast
eagle:
swoops down and claws player(s)
can screach
it can peck players too
can pick players up fly high and drop them somewhere