[Naix]

Pippy, take Hygenic the Swablu. Hygenic loves cleanliness, and as you can imagine, it hates filth as well. It hates filth so much that if it is in battle against a Poison-type, it must switch out, as they are the embodiment of filth. Note: If Hygenic and a Poison-type are on the same side in a double battle, you must switch Hygenic out. Hygenic must also permanently know Safeguard and use it in every battle it's in, to ensure everything around it is clean. Also, Hygenic refuses to learn Roost, as if it Roosts, it risks the chance of getting its wings dirty. When Hygenic evolves, it becomes more aggressive and adopts a more drastic method of disposing of trash: burning it. Hygenic must replace Safeguard with a Fire-type move or Dragonbreath when it evolves, and must use it against every Poison-type it fights. If said move runs out of PP, Hygenic won't be able to defend itself from the filth, and must switch out of Poison-types until it can use the Fire-type move or Dragonbreath's PP. It must also solo every Poison-type in the Pokemon League.
Have fun!