Darth Pope said:
Well at least normal has Snorlax. Now poison, that's another story. I defy you to come up with one poison Pokemon worth your time.
Crobat, Tentacruel, Gengar. Unless you meant pure poison types, in which case yeah they suck.
Typewise, let's see...
Favorite: Bug/Steel. 9 resistances, one immunity and only one weakness. The only downside is it's a double weakness, so you have to be a little careful playing it.
Lest Favorite: Anything with Ice in it. Only resists itself; weak to 4 types, all of which are extremely common. Ice paired with almost any other type in the game makes that type worse off than it started with.