Pokémon Conquest was released in the USA, today. Recently this month, the official site revealed a password to unlock Oshawott, which is frCLRpXG88 and Gible, which is LTb3n3RYJ8. Those of you who purchased the game may notice that a password was included for Dratini: Sr5Z5GqAgR. IGN also gave the password for Gyarados: mq2xRVNgRL.

From June 18th until December 31st, a bonus Pokémon Conquest episode is available for download over the Nintendo Wi-Fi connection. Once the first ending sequence has been reached, then this episode will be playable. Here is a quote from the official site that summarizes the episode:

"At the start of the hero's story, Motonari and Motochika stand in the way. But these impressive Warlords can become allies in this episode.
Their specialties are Grass-type and Water-type Pokémon respectively, and they have the chance to support the hero."


Source: http://www.pokemonconquest.com