for the plant thingy u have to garden alot in seasons.

about the lycanthrosism thingy, you have to move out in the country where a lot of wolves and try to find a wold with yellow glowing eyes and try to build up a best friend relationship and it will decide if it wants to bite you.
hint: to make it eaisier have a baby and that increase the chance to see a infected wolf also have a lot of trees in your yard and let weeds grom alot too. bye!!

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No, but i am Wondering the same thing!

for werewolves (or lycans) you need to have the sims 2 pets expansion pack. wait for a stray dog with yellow eyes to come by your house at night and befriend it until it bites you.
for plant sims you have to have the seasons expansion pack.