Parents: Togekiss + Glalie
Shared egg group: Fairy
Offspring name: Glakiss
New type: Fairy / Ice
New base stats: 92 / 75 / 97 / 110 / 107 / 90 (BST: 571)
New ability and desc: Serene Focus (aka Shield Dust): User is immune to secondary effects of moves.
Notable moves: Air Slash, Ancient Power, Aura Sphere, Baton Pass, Body Slam, Dazzling Gleam, Defog, Double-Edge, Encore, Extreme Speed, Explosion, Fire Blast, Flamethrower, Grass Knot, Heal Bell, Heat Wave, Hyper Voice, Light Screen, Magic Coat, Morning Sun, Nasty Plot, Psychic, Psyshock, Reflect, Roost, Shadow Ball, Soft-Boiled, Thunder Wave, Tri Attack, Trick, Wish, Zen Headbutt, Focus Punch, Retaliate, Steel Wing, Work Up, Water Pulse, Yawn, Blizzard, Dark Pulse, Disable, Freeze-Dry, Ice Beam, Iron Head, Spikes, Super Fang, Switcheroo, Taunt, Icy Wind
Role identification: A special attacker with decent bulk and ok typing. Could be a decent lead with decently good speed with its defensive stats, Taunt and Spikes. It can also be a cleric, offensive or defensive, due to its access to Baton Pass, Heal Bell and Wish. Lastly, it can be a bulky attacker or defensive wall. With lots of viable options, Glakiss is quite good on its own even without a mega.
New base stats: 92 / 115 / 97 / 150 / 107 / 110 (BST: 671)
New ability and desc: (Refrigerate)
Notable moves: Air Slash, Ancient Power, Aura Sphere, Baton Pass, Body Slam, Dazzling Gleam, Defog, Double-Edge, Encore, Extreme Speed, Explosion, Fire Blast, Flamethrower, Grass Knot, Heal Bell, Heat Wave, Hyper Voice, Light Screen, Magic Coat, Morning Sun, Nasty Plot, Psychic, Psyshock, Reflect, Roost, Shadow Ball, Soft-Boiled, Thunder Wave, Tri Attack, Trick, Wish, Zen Headbutt, Focus Punch, Retaliate, Steel Wing, Work Up, Water Pulse, Yawn, Blizzard, Dark Pulse, Disable, Freeze-Dry, Ice Beam, Iron Head, Spikes, Super Fang, Switcheroo, Taunt, Icy Wind
Role identification: ...Refrigerate Extreme Speed. REFRIGERATE EXTREME SPEED.
In all seriousness, as well as fulfilling normal Glakiss' roles, Mega Glakiss can be a great physical attacker, and due to its higher speed, it could be used better as an attacker in general.