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It's round stats (and Ground resistance) allow it to serve as a much better pivot, as Roserade will take heavy from even resisted physical moves, and the extra Speed is also nice. Additionally, Seed Flare gives Shaymin a high powered STAB it can use multiple times (Rosy only has Leaf Storm). Rosy is definitely more dangerous with its great Sp Atk and Sleep Powder and is a great supporter with Spikes, but Shaymin has plenty of its own advantages that make it a worthwhile Pokemon when you want a Grass Pokemon with a great combo of power and defense.What makes Shaymin good? It just seems like it would have a tough time earning a team spot against Roserade. Are their any notable advantages it has over Roserade except for base 100 stats all around?