A Pokemon's type determines the kind(s) of elemental energy they can channel the best. Techniques that match that element naturally harness their energy more easily, and are, thusly, more powerful. However, certain types, and even certain Pokemon not of those types (Cubone comes to mind) are more adept to focus their energy in other ways. Elemental energy is always the same, but it's the way it is focused and harnessed that changes elemental attacks.
We don't allow specific resistances to any species' weaknesses in any noticeable capacity, as it's something that was abused far too much, even after we disallowed it.
Pages in category "Elemental Types"
The following 18 pages are in this category, out of 18 total.