Metagross Speed EVs:

W/Jolly Nature:
113: Outspeeds Norman's Boofalaunt, Brawley's Machamp, Chuck's Machamp, Roark's Relicanth, Juan's Relicanth
111: Outspeeds Tate's Xatu and Liza's Xatu
110:
108:
107: Outspeeds Pryce's Lapras, Lenora's Kangaskhan, Gardenia's Tangrowth
105: Outspeeds Candice's Mamoswine, Blue's Machamp
104:
103:
102: Outspeeds Blaine's Rotom-H, Watson's Ampharos, Volkner's Rotom-H, || Burgh's Crustle, Roxanne's Armaldo, Roark's Crustle, Roxie's Drapion, Red's Venusaur
100:

W/Adamant Nature:
103: Outspeeds Blaine's Rotom-H, Watson's Ampharos, Volkner's Rotom-H
101: Outspeeds Burgh's Crustle, Roxanne's Armaldo, Roark's Crustle, Roxie's Drapion, Red's Venusaur
100:
99: Outspeeds Wallace's Milotic (big)
98: Outspeeds Brycen's Beartic
96: Outspeeds Winona's Altaria, Winona's Tropius, Skyla's Mandibuzz, Fantina's Drifblim, Tate's Gallade, Liza's Gardevoir, Candice's Glalie, Drayden's Altaria, Clair's Altaria
95:
94:
93: Outspeeds Chuck's Hitmonchan, Brock's Golem
91: Outspeeds Liza's Claydol, Roxie's Garbodor