"It may plummet from the sky. If attacked by a SPEAROW, it will violently shake its leaves."
Another interesting Grass-Pokemon from the Johto region, they say that Sunkern is connected to the sun in a very special way, and that's proven in the anime where its exposure to sunlight is vital, not unlike actual plants. What's more, it's one of the few Pokemon that can only evolve via the Sun Stone, further showing its connection with the sun above.
Sunkern's Basic Attacks are Razor Leaf and Cut, while its Special Attacks are Grass Knot, Seed Bomb, and Energy Ball.