The challenges in classifying Seismitoad, along with a few other pokemon such as Beedrill and Charizard, have led to calls from an increasing number of scientists for the recognition of some species as having three pokemon types. For under the current taxonomy, Seismitoad are far and away the most venomous pokemon not to be considered poison type in the world, surpassing many poison pokemon in the virulence of their venom.
There is some support for the current classification scheme, imperfect though it is, in the fact that Seismitoad do absorb psychic attacks far more easily, and grass techniques with far more difficulty, than the so-called "true poison" pokemon. But as any who have tried to burn or freeze a Snorlax or seen their Rhydon electrified through their horn know, pokemon types are often abstractions for trainers' benefit; a guideline to attacks, weaknesses, and resistances, not a fundamental truth which describes every species of a particular type the same way. Seismitoad are famous for shooting a powerful neurotoxin from the numerous spheres on their bodies, capable of seemingly paralyzing and poisoning enemy pokemon (and unwary humans who disturb their territory) at once. Their powerful fists can shatter bone, but pokemon who are not instantly defeated by their punch often find themselves slowly weakening over the rest of their battles with the Seismitoad – provided, of course, the fights last long enough for them to notice.
Although Seismitoad are not likely to be reclassified in the near future, trainers and travelers should be advised to exercise every bit as much caution with them as with any official poison type. They may be far more damaged by grass pokemon than a Muk, but make no mistake; if left untreated, Seismitoad venom can cost you your life, and the lives of your precious pokemon.