I don't know what you're talking about with Lillipup.
Lilipup evolves into Herdier at level 16.
78
At Level 16 to Heirdier and 32 to Scoutland
LV 17
Evolve a Lilipup to Herdier at level 16 then evolve Herdier to Stoutland at level 32.
Lillipup cannot learn ember.
Stoutland is the last Evolution of its chain. You were probably thinking of Herdier. Lilipup level 16 evolves to Herdier and Herdier level 32 evolves to Stoutland.
Lillipup can be found on Routes 1, 2, and 3 in Black. They are pretty common, and range from level 2 to level 11, depending on the Route.
It Can be caught on route 1.
A new feature to the game is the first gym. The leader you face depends on the starter you chose. If you chose Oshawott then the leader you face has a Pansage (Grass Type) and a Lilipup If you chose Tepig then the leader you face has a Panpour (Water Type) and a Lilipup. If you chose Snivy then the leader you face has a Pansear (Fire Type) and a Lilipup.
A Lileep will evolve on level 40. So will Anorith.
Lillupup evolves into Herdier at Lv. 16 Herdier evolves into Stoutland at Lv. 32