OceanKnight395

Tolnelos is only available in Black, and Boltlos is only available in White. You need both of them in one game (in which one of them you HAVE to be the one who caught it), and go to a place in Route 14 where Landlos will come to battle. It's not very easy, and you don't need it to complete the Pokedex.

You go right from the Electric Gym Leader's city, and go into the forest. I dunno, it's kind of hard to explain.

The designer got some ideas from a sea lion show. It's kind of hard to believe that the Oshawatt (did I spell it right?) family were designed by the same guy who designed Piplup...