Tycho Curious

Tycho Curious is an alien-Sim hybrid baby who appears in The Sims 2 and The Sims 2 for PSP. He is the son of Pascal Curious and the alien Pollination Technician.

Life leading up to The Sims 2
In The Sims 2 for PC, the unborn alien baby of Pascal Curious will be born shortly after starting to play the household. Pascal Curious was abducted by aliens before the game started, and he is on his third day of his pregnancy.

Unlike Brandi Broke, whose child is always a boy, Pascal's baby may be either male or female. There is, however, no chance that twins will be born unless the  cheat code is used. When it is born, the baby will usually have green skin and black hair. However, it may have Pascal's skin tone. Most of the time, it will have black eyes, but it's possible for them to be dark blue like Pascal's.

Life leading up to The Sims 2 (PSP)
In The Sims 2 for PSP, the child was a boy named Tycho. In the story, Tycho was kidnapped by Vidcund Curious to make experiments, just like his father's friend, Nervous Subject.

He is held in the Secret Sub-level in Division 47.