Ivysaur
Environment: Ivysaur are found wherever Bulbasaur live although their numbers are slightly smaller
Rarity: As about 60% of Bulbasaur survive to evolve to Ivysaur they are only slightly rarer than their previous state.
Age: Ivysaur generally live to around 40 years of age, the oldest found in the wild was 46 whilst the oldest in captivity was 55.
Diet: The diet of an Ivysaur is much the same as that of a Bulbasaur however because the bulb on its back is now capable of photosynthesis it gets only ¾ of it's energy from food and therefore requires less food than a Bulbasaur.
Predators: Ivysaur are hunted by the same pokemon that hunt Bulbasaur.
Evolution: Only a few Ivysaur gather the energy needed to evolve to their final stage in the wild. As they approach evolution the bulb on it's back begins to give off a sweet scent that gets heavier as evolution approaches, this scent attracts other Venusaur in the area and let's them know that the Ivysaur is going to evolve.
Social: Ivysaur tend to live in small groups or in mated pairs, and unlike Bulbasaur they tend to live away from other Pokemon unless they knew them before evolution in which case they will remain loyal friends. They are more aggressive than their previous evolution and are more willing to use force when defending themselves from predators and humans but they still make frequent use of sleep powder and stun spore where necessary.
Mating (pregnancy): Ivysaur, although lacking any real mating season, show a tenancy to mate in spring, they are fertile and their gestation method is one of the most complex amongst the know species of Pokemon. During the act of mating the male Ivysaur releases pollen from the bulb on his back, this will fertilise the females bulb at the same time his sperm fertilises the egg in her womb. For Ivysaur the general gestation period is nine months and usually results in the live birth of a single Bulbasaur; cases of twins and even triplets have been recorded but these are incredibly rare and one or all of the children is usually handicapped or malformed in some way. For the first three months of pregnancy the foetus and the seed for the plant develop separately, then at three months the seed is moved through a tube that leads from the base of the females bulb into the womb, still connect to the mother by a second umbilical cord it is suspended just above the back of the developing Bulbasaur. Over the next four months the developing foetus envelops the seed and the seed puts out it's root system into the Bulbasaur whilst it's flesh is still soft and developing. Once the seed is firmly rooted the umbilical cord holding it in place severs and the seed begins to take sustenance from the developing foetus there is then two more months whilst the Bulbasaur finishes developing and acclimatises to the energy drain the seed causes. There have been cases where the seed and host fail to take and this can lead to a Bulbasaur without a bulb or just the seed germinating and killing the host, in either case the deformed child is most often left to die by the parents and although the plant my well flourish if left alone an abandoned Bulbasaur without a bulb has a mortality rate of 98%.
Other: It is possible to mate an Ivysaur with any other pokemon in it's egg group if pollen is provided during the intercourse however these couplings are more likely to experience some kind of mutation or birth defect.