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 left corner of the map.
Unlock Medals
After doing a Game Sync, you can find and meet conditions for medals, as below, on the Global Link:
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 Test Beginner - Get the Beginner rank in the Battle Test.
Battle Test Hyper - Get Hyper Rank on the Battle Test.
Battle Test Master - Get Master Rank on the Battle Test.
Battle Test Normal - Get the Normal rank in the Battle Test.
Battle Veteran - Fight 400 battles.
Battle Virtusoso - Go through 2,000 battles.
Beginning Trader - Use Link Trade once.
Berry Gardener - Pick 10 Berries from fields.
Berry Picker Fan - Complete Berry Picker Unlimited.
Berry Scientist - Create a mutated Berry.
BP Wealthy - Obtain 100 BP.
Broad Friendship - Register 30 friends.
Broad Friendship - Register 30 Friend Codes.
Bug-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
Busy Save - Save 20 times.
Capturing Spree - Catch 50 Pokemon in 24 hours.
Central Kalos Pokedex Completionist - Complete the Central Kalos Pokedex.
Coastal Kalos Pokedex Completionist - Complete the Coastal Kalos Pokedex.
Countess - Achieve this rank in the Battle Chateau.
Dark-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
Dragon-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
Duchess - Achieve this rank in the Battle Chateau.
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.
Egg Breeder - Hatch 10 Pokemon Eggs.
Egg Elite - Hatch 50 Pokemon Eggs.
Evolution Authority - Evolve Pokemon 100 times, enough to astound Pokemon Breeders.
Evolution Expert - Evolve 50 Pokemon and become recognized by Pokemon Breeders.
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.
Fairy-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
Fashion Leader - Accumulate a lot of clothing.
Fighting-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
Fire-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
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).
Flying-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
Frequent Trader - Use Link Trade fifty times.
Friend Safari 10 - Have 10 encounters in the Pokemon Safari.
Ghost-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
Good Rod Fisherman - Find 10 Pokemon when fishing.
Grand Duchess - Achieve this rank in the Battle Chateau.
Grand Duke - Achieve this rank in the Battle Chateau.
Grass-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
Gratitude - Tip people generously.
Great Customer - Spend $100,000 at PokeMarts.
Great Trade-Up - Have 100 Link Trades.
Ground-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
Hall of Fame - Beat the Elite Four and Champion ten times.
Happy Birthday - Get a birthday wish through the PSS.
Hard Cycling - Ride a Bicycle 100 times.
Hatching Aficionado - Hatch 100 Pokemon Eggs.
Head It Fan - Complete Head It Unlimited.
Heavy Walker - Walk 20,000 steps.
Honored Footprints - Walk 100,000 steps.
Ice-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
Indulgent Customer - Spend $1,000,000 at PokeMarts.
Kalos Pokedex Completionist - Complete the entire Kalos Pokedex.
Light Walker - Walk 5,000 steps.
Link Battle Amateur - Fight one Link Battle.
Link Battle Pioneer - Have 10 Link Battles.
Lumiose Explorer - Explore much of Lumiose City and become very stylish.
Lumiose Star - Explore all of Lumiose City and become extremely stylish.
Lumiose Tourist - Explore some of Lumiose City and become a little stylish.
Marchioness - Achieve this rank in the Battle Chateau.
Marquis - Become a Marquis at the Battle Chateau.
Middle Walker - Walk 10,000 steps.
Mighty Fisher - Find 100 Pokemon while fishing.
Moderate Customer - Spend $10,000 at PokeMarts.
Mountain Kalos Pokedex Completionist - Complete the Mountain Kalos Pokedex.
Naming Champ - Give 10 Pokemon nicknames.
Never Give Up - A Medal for those who don't know when to quit even when there's nothing they can do.
Noneffective Artist - Mistakenly use moves that are not effective (i.e. Electric on Ground).
Normal-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
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.
O-Power MAX - Use O-Powers 100 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.
Poison-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
PokeMile Hoarder - Get 10,000 PokeMiles.
Pokemon Center Fan - Rest your Pokemon at a Center many times.
Pokemon-Amie Aficionado - Play with a Pokemon in Pokemon-Amie 10 times.
PokeRadar Operator - Get data on ten Pokemon with the PokeRadar.
PR Video Debut - Make one PR Video and show it off.
Psychic-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
Regular Customer - Keep going to PokeMarts, becoming regular customers.
Rock-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
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.
Steel-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
Step-by-Step Saver - Save 10 times.
Successor in the Making - Get a Pokemon to Mega Evolve.
Super Rod Fisherman - Find 50 Pokemon while fishing.
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).
Television Kid - Repeatedly watch television.
Tile Puzzle Fan - Complete Tile Puzzle Unlimited.
Top Sky Trainer - Defeat all Sky Trainers in the game.
Trash Master - Check empty trash cans.
Trick Master - Use many tricks on Roller Skates.
Viscount - Become a Viscount at the Battle Chateau.
Viscountess - Achieve this rank in the Battle Chateau.
Water-Type Catcher - Catch all Pokemon of this type in the Kalos Pokedex.
Wonder Writer - Save 100 times.
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.
Oval Charm
When you complete all 3 of the Kalos Pokedexes (Central, Coastal, and Mountain), return to Professor Sycamore at the Pokemon Lab in Luminose City and he will give you the Oval Charm. The Oval Charm increases the likelihood of finding an egg at the Day Care.
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.
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.
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.
The Looker Detective Agency
After you've beaten the Elite 4 and unlocked Kiloude City, return to Lumiose City. You'll receive a Holo Caster message from a detective named Looker. He'll hire you as an assistant and have you go on sidequests.
The National Pokedex
After beating the Elite 4, return to Lumiose City and speak to Professor Sycamore at the train station. You'll receive a final upgrade to your Pokedex that covers Pokemon beyond the Kalos region.
The Poke Radar
After beating the Elite Four, return to Lumiose City and speak to the scientist on the second floor of Professor Sycamore's lab. He'll give you the Poke Radar, which helps you locate Pokemon hidden in the tall grass.
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.
Birthday Message
When you first enter a Pokemon Center on your birth date, you'll be greeted with confetti and well-wishes from the nurse. The music will change to a music-box version of the Pokemon Center theme, and a digital birthday cake will be displayed on the wall. If you don't want to wait for your actual birthday, just change the date on your 3DS profile.
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.