Shelmet and Accelgor

Shelmet
The Snail Pokémon
Type: Bug
Official Registration #: 616
Entry: This snail-like pokémon is protected by a steel-hard shell. When threatened, it retreats into this shell and spits a sticky, poisonous acid onto the aforementioned threat. Both of these are fortunate adaptations, considering the fact that its main predator is also its own evolutionary partner. In short, shelmet has, over countless generations, slowly adapted its ability to survive the one process most pokémon undergo naturally. Because nature is a kind and forgiving mistress.

Accelgor
The Shell Out Pokémon
Type: Bug
Official Registration #: 617
Entry: The evolved form of shelmet, if the subject is traded with or drains a sufficient amount of energy into a karrablast. Without its heavy shell, this ninja-like pokémon gains the dexterity and speed to attack with relentless, acrobatic movements. This, of course, would give it a natural edge to its main predator, escavalier, the exact pokémon who stole its shell and used it as armor for its own body. However, the fact of the matter is that none of accelgor’s techniques are effective against escavalier’s bug/steel elements, and thanks to its missing shell, accelgor lacks protection against escavalier’s bold and relentless fighting style. Because, again, nature is a kind and forgiving mistress.