These are the regional mammals, just like Rattata, or Bidoof:

Chindrilla, the Chinchilla Pokémon

Type: Normal-Ground

They use their sharp claws to dig enormous dens with interconnected tunnels, which can stretch for miles. You can observe these tunnels in most Sekan metro stations.

Excacacha, the Vizcacha Pokémon

Type: Normal-Steel

The drill on their tails is capable of cutting through steel: this can cause quite the trouble, because many times they accidentally destroy parts of metro stations as they dig their dens. They are in a constant feud with Excadrill, their natural enemy.

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FYI, Vizcachas are a sort of chinchilla that live in Argentina (obviously), and dig large tunnels that can house over 50 of the little creatures!

And that was your useless animal fact of the day