Upon waking up in your house at the beginning of the game, your character will be holding a Pikachu 3DS XL. On the ground is a Wii U. If you are a girl it will be white, and black if you are a boy.
Additional Trainer PR Studio captions
Defeat the Elite 4 and meet Looker, then return to the Trainer PR Studio in Lumiose City. Choose to edit your video to see new caption text options that reference your championship status.
Birthday greetings
Enter a Pokemon Center on your birthday to get a special greeting, including confetti, new music, and a digital birthday cake on the wall.
Dragon Ball Z reference
Go to Route 6 or 7 and a random Psychic Pokemon trainer will challenge you. After you defeat him he will say "Wow! You and your Pokemon's power levels are incredible! They're over 9,000 for sure!".
Earn Easy Money
The Trainers at the Battle Chateau pay out amounts in excess of P1,000 per battle when you start out, but as you gain rank these amounts skyrocket to north of P20,000 per battle. Combining this with an Amulet Coin and/or the Prize Money O-Power can result in a very profitable day at the Battle Chateau.
Easy breeding
After getting an egg or several eggs from the breeders, go to Prisim Tower in Lumiose City. Outside of the tower hold Left or Right to start an infinite loop without worrying about random battles. You can use a piece of tape to hold down the direction.
Friend Safari
After you beat the Elite Four, go to Lumiose City and get the TMV pass to go to Kiloude City. Once you are in Kiloude City go to the top right corner of the map.
Getting Glaceon and Leafeon
To evolve an Eevee into a Glaceon or Leafeon, you must be standing next to Ice Rock or Moss Rock when leveling it up. Ice Rock can be found first; it is located in the deepest part of the Frost Cavern (the cave is not too large). Moss Rock is found closer to the end the quest to defeat the Elite Four. It is on Route 20, between Snowbelle City and the Pokemon Village. Enter the area from Snowbelle to immediately see it.
Getting Mewtwo
Mewtwo can be found in the Pokemon Village. Cross a small stream on the western side using the Surf HM to reach a cave entrance. Mewtwo will be inside immediately after entering the cave. At first, a man will block the cave entrance, but he will disappear once you defeat the Elite Four. Mewtwo is Level 70; use a Master Ball to easily capture him, otherwise it will be a long battle and require a lot of Ultra Balls. As soon as you capture him, you will also get the special stone needed to activate Mewtwo's Mega Evolution.
Getting Pikachu
Pikachu can be found very early in Route 3, immediately after the forest, in small grass patches. Pikachu is a great early Pokemon. He has high special attack and speed stats that give him an advantage early in the game. His special characteristic, Static, works very well early in the game by paralyzing Pokemon that come in contact with him. Pikachu also levels up very quickly early in the game with a lot of bird type Pokemon in the grinding areas. He is overall a great addition to any team early in the game.
Getting Sylveon
To get a Sylveon, you must max out all three stats (Affection, Fullness, and Enjoyment) for an Eevee to evolve it into a Sylveon. To max out all stats for an Eevee, keep petting it and playing the mini-games. It should take approximately one hour to max out all the stats for the Eevee using this method. Note: Make sure to teach the Eevee a Fairy move before leveling it into the Sylveon.
Getting Zygarde
Zygarde is found deep inside the Terminus Cave, which is located just off Route 18. The Terminus Cave is one of the longest dungeons in Pokemon X and Y; thus, make sure to have lots of healing items and strong Pokemon before entering it. Zygarde is Level 70 and dual Dragon and Ground-type; use a Master Ball to easily capture him, otherwise it will be a long battle and require a lot of Ultra Balls.
Heal party anywhere without items
To fully restore your party anywhere in the game, simply start a wireless battle. If your opponent accepts, once you are returned to the overworld, your entire party will be in perfect health.
Infinite Heart Scales
Heart Scales can be used to teach your Pokemon moves you forgot or never learned at the Move Relearner in Dendemille Town. To obtain Heart Scales in Pokemon X and Y you need the Old Rod from Ambrett Town in the Aquarium by the Magikarp Statue and TM46, Thief, from Cassius's house in Camphier Town. Use the Old Rod on the Route 8 - Muraille Coast to battle Luvdics who have a 50% chance of carrying a Heart Scale. Keep fishing for an infinite supply of Heart Scales. Switch spots if Luvdisc doesn't take the bait.
Legendary Birds
Defeat the Elite 4. Depending on your starting Pokemon, you can encounter the corresponding Legendary Bird wandering around Kalos.
If you started with Froakie, Moltres will be available.
If you started with Chespin, Articuno will be available.
If you started with Fennekin, Zapdos will be available.
After encountering the bird, look it up in the Coastal Kalos Pokedex to find its current location. Walk there to challenge the bird again. Repeat the process and it will eventually go to Sea Spirit's Den, where you will have the chance to catch it.
Looker Detective Agency
Defeat the Elite 4, go to Kiloude City, then return to Lumiose City. You will get a Holo Caster message from a detective named Looker, who will hire you as an assistant and allow access to various side quests.
Mewtwo Sidequest
After beating the Elite 4, return to Pokemon Village. At the top of the area, there should be a cave that was previously inaccessible. Inside you'll be given the chance to catch a level 70 Mewtwo.
National Pokedex
Defeat the Elite 4, then return to Lumiose City and speak to Professor Sycamore at the train station.
New clothing
The items in the boutiques are the only way to get new clothes for your avatar, and their stock changes daily. You can find boutiques in the following cities: Anistar City, Cyllage City, Laverre City, Santalune City, and Snowbelle City.
New Trainer Card colors
Complete any of the following tasks to advance your Trainer Card color from green to blue, then silver, then gold.
Defeat the Elite Four and Champion to enter the Hall of Fame.
Capture all Pokemon in the Kalos Pokedex.
Get a 50-win streak in the Battle Maison.
Nintendo 3DS and Wii U references
Select the girl trainer. She gets out of bed with a Pikachu Nintendo 3DS XL in her hand and a white Nintendo Wii U on the floor. It is the same for the boy trainer, but instead he has a black Nintendo Wii U on the floor of his bedroom.
Oval Charm
Complete the Kalos Central, Coastal, and Mountain Pokedexes, then return to Professor Sycamore at the Pokemon Lab in Luminose City to receive the Oval Charm. It increases the chance of finding an egg at the Day Care.
Poke Radar
Defeat the Elite Four, then return to Lumiose City and speak to the scientist on the second floor of Professor Sycamore's lab to receive the Poke Radar. It helps locate Pokemon that are hidden in tall grass.
Power Ring Upgrade
After you've beaten the Elite 4, travel to Kiloude City and beat your rival. Then, travel to Anister City and speak to Professor Sycamore at the sundial. You'll receive an upgrade to your Power Ring, which will allow you to find more evolutionary Mega Stones between 8 PM and 9 PM.
Rollerskate Tricks
Trick
How to unlock
360
Lumiose City, Estivel Avenue - If you rotate the Circle Pad in a quick motion, you will do a spin while moving.
Back Flip
Lumiose City, North Boulevard - When going over a ledge at high speed, you will do a back flip.
Cosmic Flip
Lost Hotel - If you have enough speed and have the skill learned the previous 4 tricks while going on a ledge, then you will have a special flip.
Parallel Swizzle
Lumiose City, South Boulevard - If you tilt the Circle Pad in the opposite direction, you will turn in that direction quickly while gaining speed.
Running Start
Lumiose City, Vert Plaza - If you start running with the D-Pad then switch to the roller skates using the Circle Pad, you will gain more speed.
Special Storage Box Wallpapers
After you've beaten the Elite 4 and become the Champion, go back and check the Pokemon storage system. You'll be able to access a new set of wallpapers for your boxes.
Special Trainer PR Studio Captions
After you've beaten the Elite 4 and met Looker, head back to the Trainer PR Studio in Lumiose City. If you decide to edit your video, you'll find a few new caption text options that reference your becoming the champion of Kalos.
Storage box wallpapers
Defeat the Elite 4 and become the Champion, then check the Pokemon storage system.
The Legendary Birds
After you beat the Elite 4, one of the three legendary birds from the original Pokemon Red and Blue will start roaming throughout Kalos. Which bird you get depends on your starter. If you chose Froakie, you'll find Moltres. If you chose Chespin, you'll find Articuno. If you chose Fennekin, you'll find Zapdos. After encountering one of the birds in the wild, check its entry in your Coastal Kalos Pokedex. It'll show the bird's current location. You must walk - not fly - to the location and challenge the bird again. After fleeing several times, the bird will eventually retreat to Sea Spirit's Den, finally giving you the chance to catch it.
Time Trick
You can modify the local time on your 3DS to affect certain daily events. A few examples:
Send a red Writ of Challenge and keep changing the time by an hour to keep changing the trainers without having to wait.
Before midnight, set the time back for unlimited writ time.
Acquire daily items and daily activities by setting the clock to 23:59.
Trainer Card Changes
When you start the game, your Trainer Card initially is colored green. By meeting certain conditions in the game, you can effectively level up your card, which changes its color to blue, then silver, then gold - the conditions are below.
Unlockable
How to Unlock
New Trainer Card Color
Beat the Elite Four and Champion to enter the Hall of Fame.
New Trainer Card Color
Capture all Pokemon in the Kalos Pokedex.
New Trainer Card Color
Get a 50-win streak in the Battle Maison.
Various Medals
After doing a Game Sync, you can find and meet conditions for medals, as below, on the Global Link.
Medal
How to unlock
Ace Pilot
Use Fly in the field many times.
Archeology Lover
Revive a Pokemon from a fossil.
Battle Learner
Fight 100 battles.
Battle Maison 20-Win Streak (Double)
Compelte 20 Double Battles in a row at the Battle Maison.
Battle Maison 20-Win Streak (Multi)
Compelte 20 Multi Battles in a row at the Battle Maison.
Battle Maison 20-Win Streak (Rotation)
Compelte 20 Rotration Battles in a row at the Battle Maison.
Battle Maison 20-Win Streak (Single)
Complete 20 Single Battles in a row at the Battle Maison.
Battle Maison 20-Win Streak (Triple)
Compelte 20 Triple Battles in a row at the Battle Maison.
Battle Teacher
Fight 200 battles.
Battle Veteran
Fight 400 battles.
Beginning Trader
Use Link Trade once.
Berry Gardener
Pick 10 Berries from fields.
Berry Scientist
Create a mutated Berry.
Broad Friendship
Register 30 Friend Codes.
Busy Save
Save 20 times.
Central Kalos Pokedex Completionist
Complete the Central Kalos Pokedex.
Coastal Kalos Pokedex Completionist
Complete the Coastal Kalos Pokedex.
Duke
Become a Duke at the Battle Chateau.
Earl
Become an Earl at the Battle Chateau.
Easy Cycling
Ride a Bicycle 30 times.
Egg Beginner
Hatch a Pokemon Egg.
Evolution Hopeful
Evolve one Pokemon.
Evolution Tech
Evolve 10 Pokemon.
Exp. Millionaire
Earn 1,000,000 EXP. in 24 hours.
Experienced Saver
Save 50 times.
Extensive Friendship
Register 10 Friend Codes.
First Encounter
Meet a real-life player in the game.
First Friend
Register one Friend Code.
Fledgling Photographer
Send one photo to the Pokemon Global Link (PGL).
Frequent Trader
Use Link Trade fifty times.
Friend Safari 10
Have 10 encounters in the Pokemon Safari.
Good Rod Fisherman
Find 10 Pokemon when fishing.
Great Customer
Spend $100,000 at PokeMarts.
Happy Birthday
Get a birthday wish through the PSS.
Hard Cycling
Ride a Bicycle 100 times.
Heavy Walker
Walk 20,000 steps.
Honored Footprints
Walk 100,000 steps.
Light Walker
Walk 5,000 steps.
Link Battle Amateur
Fight one Link Battle.
Lumiose Explorer
Explore much of Lumiose City and become very stylish.
Lumiose Tourist
Explore some of Lumiose City and become a little stylish.
Marquis
Become a Marquis at the Battle Chateau.
Middle Walker
Walk 10,000 steps.
Moderate Customer
Spend $10,000 at PokeMarts.
Mountain Kalos Pokedex Completionist
Complete the Mountain Kalos Pokedex.
Noneffective Artist
Mistakenly use moves that are not effective (i.e. Electric on Ground).
O-Power Lv. 1
Use an O-Power once.
O-Power Lv. 2
Use an O-Power ten times.
O-Power Lv. 3
Use an O-Power 50 times.
Occasional Trader
Use Link Trade ten times.
Old Rod Fisherman
Find a Pokemon when fishing once.
Outgoing
Meet 10,000 real-life players in the game.
Pedaling Legend
Ride a Bicycle 500 times.
Pokemon Center Fan
Rest your Pokemon at a Center many times.
Pokemon-Amie Aficionado
Play with a Pokemon in Pokemon-Amie 10 times.
PR Video Debut
Make one PR Video and show it off.
Regular Customer
Keep going to PokeMarts, becoming regular customers.
Smart Shopper
Get a Premier Ball (buy 10+ Poke Balls).
Sociable
Meet 100 real-life players in the game.
Starter Cycling
Ride a Bicycle once.
Step-by-Step Saver
Save 10 times.
Successor in the Making
Get a Pokemon to Mega Evolve.
Super-Training Instructor
Play with a Pokemon in Super Training 10 times.
Supereffective Savant
Repeatedly abuse type weaknesses (i.e. Fire on Grass).
Sweet Home
Return to your hometown (Vaniville Town).
Trash Master
Check empty trash cans.
Trick Master
Use many tricks on Roller Skates.
Viscount
Become a Viscount at the Battle Chateau.
Wonder Writer
Save 100 times.
Zygarde Sidequest
After beating the Elite 4, return to Terminus Cave. You'll be able to reach the lowest level of the cave, which features a few rare items and the chance to catch a level 70 Zygarde.