2. Pokémon (series)
Surely Pokémon is okay, I know it's battling monsters, but it must be mostly fine. Well, there are a few things that aren't. Since the second generation games Pokémon have been able to breed, and get eggs for new ones. In the third generation a gigantic whale and a small cat Pokémon were introduced, who can breed together, leading to something fans called "Hot Skitty On Wailord Action" (Do not Google this if you want your innocence intact). A game also came along called Colosseum on the GameCube which put you in a control of a (reformed) evil team member capturing Pokémon. Again, as with Animal Crossing, this suffers from the community mucking it up as adults will often name their Pokémon crude things and these can now be traded online, so your child may end up in battle with Fuckyou the Pikachu.