"The fragrance of Meganium's flower soothes and calms emotions. In battle, this Pokémon gives off more of its becalming scent to blunt the foe's fighting spirit."
Meganium was the final proof of Ash's bond with Chikorita/Bayleef, and Meganium has served him well in battle, including winning some key matchups in League battles. They've remained close even though Ash doesn't carry her in his party anymore.
Meganium's Basic Attacks are Vine Whip and Razor Leaf, while its Special Attacks are Petal Blizzard, Solar Beam, and Earthquake.