The first of these Pokémon you are likely to come across is Darmanitan. In the Desert Resort you will find many statues standing around the entrance to the Relic Castle. These Darmanitan are unique in that they have the special ability Zen Mode, which changes them into a Fire/Psychic Pokémon when their HP drops to less than 50%. Use a Ragecandybar on one to wake it up.

Remember the good old days when you couldn't pick up a Pokéball off the ground for fear of it being a Voltorb about to destroy your very existance? Well Black and White attempt to recreate that fear by having fluffy little mushrooms attack you instead. You can find them in Route 6 (Unova) and Route 10 (Unova).

So a fluffy little Foongus isn't menacing enough for you eh? Fine. Progress a little further up Route 10 (Unova) then into the taller grass and attempt to pick up some of those "Pokéballs". See what happens to you then.

Remember the Dreamyard you visited right back back back near the beginning of your adventure? No? Where you got your monkey? Ah yes, it's all coming back now? Excellent. Well after defeating the Pokémon League you'll gain access to an underground chamber there. Every Friday a Musharna will appear at the end of this chamber for you to catch. Extra unique in that it has the ability Telepathy. How unspeakably thrilling.

After obtaining the National Dex, head back to the Relic Castle and procede to the end of the terrifying tricky maze and if you're lucky, you might just find yourself a super-rare and pretty powerful Volcarona at the end.

While this is discussed in further detail elsewhere, use the Transfer Machine to transfer your special Raikou, Entei or Suicune to Black/White and take it to the end clearing of Lostlorn Forest. There you will see a woman who will eventually transfer into Zoroark.