Enough Speed to Outspeed the new Z Megas at +2. Sadly, You can't run Earthquake on a Grassy Terrain team so maybe it could run Knock Off to hit the likes of Dragonite and Dragapult?

Speed for Z Megas (Blaziken) @ leftoversgrassyseed  
Ability: Speed Boost  
Level: 50  
EVs: 21 HP / 32 Atk / 13 Spe  
Adamant Nature  
- Swords Dance  
- Close Combat  
- flareblitzblazekick  
- knockoffprotect