Blaziken [Speed Boost] (shiny): Fire Punch, Hi Jump Kick, Thunder Punch, Shadow Claw
Milotic [Competitive]: Surf, Dragon Pulse, Ice Beam, Hidden Power (ground)
Sceptile [Overgrow]: Leaf Blade, Earthquake, Thunder Punch, Drain Punch
Metagross [Clear Body]: Meteor Mash, Zen Headbutt, Earthquake, Ice Punch
Manectric [Lightning Rod] (shiny): Signal Beam, Thunderbolt, Flamethrower, Hidden Power (grass)
Altaria [Cloud Nine]: Fly, Giga Impact, Hone Claws, Sing or Dragon Rush
I've had this mostly planned since before Black/White. Pretty much all are gonna be mega-evo'd.