Weepinfing flap their large leaves to lift themselves off the ground, inflating themselves with toxic gases lighter than air to stay afloat. They expel these gases to attack, rapidly flapping as they refill themselves to avoid falling.
Getting up close to a Weepinfing will give you a chance to observe, through its thin skin, the toxic gases swirling inside. At night, a Weepinfing hangs on to a tree branch with its hooked rear and sleeps.