Gallade

Mega Gallade is an offensive terror with base 165 Attack and 110 Speed, as well as a wide support and offensive movepool. Mega Gallade gains the ability Inner Focus which allows it to attack through a Fake Out, beating Kangaskhan. Base 68 HP / 95 Def / 115 SpD, while respectable, isn't enough to tank repeated hits, and he is bogged down by the fact that he's sporting a weak base 80 Speed before Mega Evolution. His great STAB types allow him to take out common threats such as Kangaskhan and Amoonguss, but is completely walled by Pokemon such as Aegislash and Cresselia. His movepool comes in handy here, with Stone Edge for Flying-types and Knock Off for Ghost- and Psychic-types.