(All information from Bulbapedia)

Snivy

  • Snivy and the other Black & White starters were first revealed as silhouettes during an episode of Pokèmon Sunday on the 9th of May, 2010. They were later revealed in full in the June 2010 issue of CoroCoro.
  • Shortly after its release, much like many other Generation V Pokèmon newly introduce, Snivy received the fan made moniker, "Smugleaf." This name was picked up on and published in an article on the video gaming focused blog Kotaku and later in an issue of Official Nintendo Magazine Australia and New Zealand as well as its UK counterpart.
  • Snivy is the only Grass-type starter Pokèmon that is not listed as the first Pokèmon in its regional Pokèdex, although it is still #001; this is because the Pokèmon before it has a Pokèdex number of #000. It is also the only Grass-type starter Pokèmon thaty is not the first Pokèmon of its generation in National Pokèdex order.
  • Snivy has the lowest base stat total of all Grass-type starter Pokèmon.
  • Snivy along with Tepig and Oshwott has the lowest base experience of all Pokèmon with 28.
  • Snivy, Tepig and Oshawott are the only starter Pokèmon to evolve at an odd numbered level: 17.

Tepig

  •  Tepig and the other Black & White starters were first revealed as silhouettes during an episode of Pokèmon Sunday on the 9th of May, 2010. They were later revealed in full in the June 2010 issue of CoroCoro.
  • Tepig is the lightest Pokèmon to learn Heavy Slam.
  • Tepig has the lowest base stat of all Fire-type starter Pokèmon.
  • Tepig, Snivy and Oshawott are the only starter Pokèmon to evolve at an odd numbered level: 17.
  • Tepig along with Snivy and Oshwott has the lowest base experience of all Pokèmon with 28.
  • Tepig and its evolutionary relatives were created by Lee HyunJung.

Oshawott

  • Oshawott is the only Water-type starter Pokèmon to be based on a mammal.
  • Oshwawott has the lowest base stat total of all Water-type starter Pokèmon.
  • Oshawott along with Snivy and Tepig has the lowest base experience of all Pokèmon with 28.
  • Oshawott is the only Water-type starter Pokèmon that is not a member of the Water 1 Egg Group.
  • Oshawott, Snivy and Tepig are the only starter Pokèmon to evolve at an odd numbered level: 17.
  • Oshawott was designed by Yusuke Omura.