The Swinub Line

Swinub
The Pig Pokémon
Type: Ice/Ground
Official Registration #: 220
Entry: A small, pig-like pokémon known for its sensitive nose. This nose can detect practically anything from quite a distance away, including truffles, treasure, and buried hot springs. It runs headlong towards any scent it finds interesting and, upon locating its source, instantly digs in an attempt to unbury it. This is unfortunate, not only because of its tendency to run into anything standing between it and its goal but also because of the part where it, a ground-type, sometimes finds buried hot springs.

Piloswine
The Swine Pokémon
Type: Ice/Ground
Official Registration #: 221
Entry: The evolved form of swinub, by battle experience. Led by its incredibly sensitive nose, this pokémon runs headlong towards odors it finds interesting, just as its pre-evolved form does. However, given the fact that this is a four-foot-tall, 123-pound pig with fur that obscures its eyes and foot-long tusks, the act of running headlong into the things between it and its goal becomes more unfortunate for anything in its way, rather than for the piloswine itself.

Mamoswine
The Twin Tusk Pokémon
Type: Ice/Ground
Official Registration #: 473
Entry: The evolved form of piloswine, by battle experience if the piloswine knows Ancient Power. Fossil evidence has shown that mamoswine has existed on the planet for over ten thousand years. However, mamoswine do not occur in the wild; they only exist as the evolved form of specially trained piloswine. There are two theories as to why this is. First and more scientific, temperatures rose over ten thousand years ago, resulting in a climate far too warm for mamoswine to exist. Second and less scientific, one only has to look at swinub and piloswine’s shared habits to hazard a really good guess involving mamoswine’s bulk, its unlikelihood to be adept at stopping, and the numbers of sharp glacial cliffs during its time.