I'll begin by saying that this is a wonderful idea for a thread. Since there's nothing to work with, it'd be wise to make the Megas as per the flavor Dex entry, appearance etc., Also, I suggest that this thread have a Voting period where a suggested Mega is voted in/out, just like the OU Theorymon thread. Otherwise, there's no point in creating random mons for the lulz (Proof:
Post #203). Also, creating a discussion/voting period will increase the duration of this thread.
Ninetales-Mega (Ninetalite)
Design Description: Resembling the color scheme of Ninetales' shiny form, Mega Ninetale's eyes become a ghostly blue. Blue-colored wisps hang at the end of each of its nine tails.
Fire ----->
Fire/
Ghost
Flash Fire/
Drought ----->
Imprecate (30% chance to activate 'Curse' upon contact)
73/76/75/81/100/100 (505) ----->
103/
86/
105/
111/100/100 (
605)
New Moves (Vulpix): Tail Glow,
Shadow Ball,
Blue Flare
Strategy
Ninetales has been and most probably will be my most favorite Pokémon of all time. I'm glad I could handle its Mega in this thread. Ninetales' duty time in OU was to win the weather war. Interestingly, a bulky set with Will-O-Wisp and Roar was also widely used. In that vein, here is Mega Ninetales.
The Ghost typing is justified by Ninetales' Ruby Dex entry: "Ninetales casts a sinister light from its bright red eyes..", as well as the fact that Vulpix learns some Ghost-type moves like Grudge and Hex, which are mostly learned by Ghost types. The new ability, "Imprecate" is to emulate its "Grabbing one of its many tails could result in a 1,000 year curse" phenomenon. The Mega gains the much-needed bulk, while also retaining the ability to sweep late game with Tail Glow.
But if you think it's broken just because of Tail Glow, think again. It gains no Speed and no way to boost its Speed. Scarfers like Tyranitar, Terrakion, Keldeo and naturally quicker mons like Greninja and Aerodactyl can take it out quite easily. On top of it, it's susceptible to Sucker Punch and still weak to Stealth Rock. A bulky set with investment in HP and Defense, with a SubCM moveset is also extremely viable.
Hitmonlee-Mega (Hitmonlite)
Design Description: Its body become more muscular and gains intricate, gold-colored designs all over. The rings on its hand and feet also become golden.
Fighting ----->
Fighting
Limber/
Reckless/
Unburden ----->
Swift Feet (Priority to Kicking Moves)
50/120/53/35/110/87 (455) -----> 50/
150/53/
70/110/
122 (
555)
New Moves: Freeze Kick (Ice-type Physical move, 85 Power, 90% accuracy, Increased Critical Hit Ratio, 10% chance to Freeze, Makes Contact),
Volt Kick (Electric-type Physical move, 85 Power, 90% accuracy, Increased Critical Hit Ratio, 10% chance to Paralyze, Contact)
Strategy
Hitmonlee's Dex entries are swarmed with the fact that its feet are agile, hence the ability. Since Hitmonlee evolves from Tyrogue when its Defense is lower than its Attack, no addition has been made to its Defense or Special Defense.
If someone makes an entry for Hitmonchan or Hitmontop, please keep this in mind. Try to buff Hitmonchan's Defense and Hitmontop's Defense and Special Defense, to keep up with the flavour.
The two new moves are obvious additions to make whole the 'Elemental Kicks', since there are already Elemental Punches. While this too might seem broken, please note that only High Jump Kick, Mega Kick, Freeze Kick and Volt Kick gain a priority. A High Jump Kick can be easily predicted and taken in by a Ghost type, letting Hitmonlee suffer crash damage. Aegislash can damage it even more with King's Shield. One more important thing to note is that, its Speed Tier sits at one stat below Talonflame's.
Girafarig-Mega (Girafarigite)
Design Description: Girafarig's "tail" grows monstrous teeth and grows in size and length, much like Mega Mawile's "heads". Its horns become large, pink and resemble the animation for the move
Miracle Eye.
Normal/
Psychic ----->
Dark/
Psychic
Inner Focus/
Early Bird/
Sap Sipper ----->
Transcendence (EVs and Boosts or Drops to either Attack or Special Attack and Defense or Special Defense will count for both; EVs and Boosts do not stack; Burn affects both Attack and Special Attack)
70/80/65/90/65/85 (455) -----> 70/
120/
90/
120/
90/
65 (
555)
New Moves: Nerve Crunch (Dark-type Physical move, 85 Power, 100% accuracy, Does damage according to Special Defense, Makes Contact)
Mega Girafarig's Ability is a beauty. I'm quite proud of myself for coming up with it. Just one clarification: If you invest 252 EVs is Attack, it will also count as 252 EVs in Special Attack. However, if you invest 252 EVs in both Attack and Special Attack, it will still count as 252 EVs in either and not 504 EVs in either. The same goes to Boosts or Drops in Stats. For instance, if you Baton Pass a Work Up to Mega Girafarig, it will count as one Boost to Attack and Special Attack and not two boosts. However, if you Baton Pass a Nasty Plot, it will count as a Nasty Plot and a Swords Dance.
Calm Mind is at the crux of Mega Girafari's moveset, boosting its Attack, Special Attack, Defense and Special Defense all at once. Investment in HP is a waste since you could invest in Attack and Defense to gain EVs in Special Attack and Special Defense as well.
And like all things, it has its flaws. The primary one being 4x weak to Bug. Its Speed Stat isn't helping it either. Any Scizor worth its U-turn can shut it down (Or any quicker user of Bug Buzz). If it gets intimidated, it loses both Attack and Special Attack. Burn also affects both Attack and Special Attack. However, with proper support to take care of Bug Types and Will-O-Wispers, it can become a terrifying Sweeper. Two to three Calm Mind boost and almost nothing will stop it. A SubCM set can maximize its potential, while also avoiding Intimidate and Burn.