more than 600
Tribes of many kinds
Loch Ness Monsters have never existed but the legend is good for tourism.
The 6 kinds of monsters on Moshi Monsters are: Katsuma, Diavlo, Furi, Zommer, Poppet and Luvli!
That's hard
The usual kinds of racism that exists with respect to any group. To ask a more useful question, specify in which country the racism existed, who behaved in a racist fashion, and regarding Asians of which country or countries the racism existed, the target, if you will.
Yes there are. Neopets.com Fantage.com dizzywood.com and many more. If you love these kinds of games, type in "Virtual Games" in your search browser and many games like moshi monsters and clubpenguin will come up. :)
plants and animals but of course rare kinds.
All of the major religions of the world, Judaism, Christianity, Islam, Hinduism, Buddhism, Taoism, Jainism, Zoroastrianism, Shintoism, etc., existed by the 18th century and indeed, had existed for many centuries or millennia by that time.
Slaves
There are two kinds of membership for Moshi Monsters. The Basic Membership (free) allows access to parts of Moshi Monsters. To access all areas of Moshi Monsters you need to have a paid Moshi Membership.
There are many members who have Katsumas on Moshi Monsters.
Moshi Monsters was developed by Mind Candy in 2007 and released to the public in April of 2008. So, in 2012, it has been available to the public for four years.