Ivysaur, like its pre-evolved form, Bulbasaur, resembles a toad or a quadruped dinosaur, though the patches in its skin cause it to resemble a dinosaur more closely. After evolving from Bulbasaur, Ivysaur grows small fangs and has visible ear insides and pupils. Ivysaur's skin is also a little bit bluer than Bulbasaur's. The most notable difference in Ivysaur's appearance, however, is that its bulb has changed into a pink flower bud with leaves extending. This flower bud is heavy, thus making its back legs grow strong and sturdy to support it, causing it to be unable to rise on its hind legs. In Sugimori artworks and game sprites, Ivysaur's eyes are red. In the anime, Dream World, and Pokémon Trozei!, its eyes are purple. Again, it has three toes or claws growing out of its legs.
Much like its previous form, most of Ivysaur's abilities originate from the plant on its back. Naturally, these attacks are stronger than Bulbasaur's.
Its abilities focus on the manipulation of petals, powders, and scents more than vines and leaves, most likely because of the larger flower on its back. In the anime, Ivysaur are shown to manipulate nature.
Ivysaur's natural habitat seems to consist of plains with access to large amounts of sunshine and fresh water but can be found in forests and jungles. However, they are rare, as many are in captivity. They are normally native to Kanto.
Being much more commonly found in captivity than in the wild, Ivysaur's natural behavior is largely unknown, but it can be theorized that they are more aggressive than Bulbasaur, although it is still very loyal to its Trainer. When its plant is ready to bloom, it gives off a distinct, strong sweet-smelling aroma and starts swelling. Ivysaur will also start spending more time in sunlight in preparation for its upcoming evolution. Like its plant, exposure to sunlight adds to Ivysaur's strength.
Like its pre-evolved form Bulbasaur, Ivysaur can last many days without eating, because it can absorb the sun's energy through the flower on its back.