I'm not too good at creating sprites, but here's what I have.
Mega Luxray is an Electric/Dark type with the ability Speed Boost.
Its base stats are 80 HP 160 Atk 90 Def 103 SpA 90 SpD 100 Spe.
Mega Luxray would be a strong speed sweeper in competitive if given protect, and the fact that it gets Intimidate as an ability can give it an additional chance of beating an opponent as it would take them longer to knock it out. This is my first post, hope you like it!!