What are 4-Star Blue Eggs in Pokémon GO?

Four-star blue eggs are rare Pokémon GO raid eggs that signal an upcoming raid battle against an extra powerful boss Pokémon. When the blue egg hatches, a formidable raid boss with roughly 15,000 CP or higher will emerge for players to challenge.

In this comprehensive guide, we’ll explore everything you need to know about these uncommon blue eggs and the exciting 4-star raid battles they bring.

The Rare 4-Star Blue Egg Phenomenon

As an avid Pokémon GO player myself, I’ve always found blue eggs to be one of the most interesting parts of raiding in the game. Here‘s a quick overview of how they work:

• Blue colored eggs indicate a raid level of 4 stars on the difficulty scale. This 4-star label means the boss will have very high CP.

• These eggs are quite uncommon compared to the regular pink and yellow eggs. They only appear during certain in-game events.

• When the blue egg hatches after its 60 minute timer, an extra powerful raid boss spawns like a legendary or mega evolved Pokémon.

• Blue eggs provide a chance at exclusive Pokémon and rewards, but beating them requires teamwork.

Now that you know the basics, let’s explore blue eggs more in depth!

Egg Raid Basics: Hatching, Rewards and More

Before we dive specifically into 4-star blue versions, let’s quickly cover some key facts about raid eggs in general:

• Egg Color Meanings: Pink=1-2 stars, Yellow=3 stars, Blue=4 stars

• Egg Appearance: Spherical with Pokémon type icon (fire, water, etc)

• Hatch Timer: Counts down from 60 minutes to 0, then boss spawns

• Boss Duration: Once hatched, raid bosses last for 60 minutes before despawning

• Rewards: Rare Candy, Golden Razz Berries, TMs, XP, Stardust, chance of catching boss

• Number of Trainers: 1-2 stars can be soloed. 3 stars need 2-4 players. 4-5 stars need 4+ players.

• Shiny Chance: Normal rate is approximately 1 in 20. More for certain bosses.

• Catching: Limited Premier Balls to catch boss based on damage done and other bonuses

Now that you know the egg raid basics, let‘s examine why blue eggs are so coveted and how to find them.

Why Blue Egg Raids Are So Valuable

There are a few key reasons why 4-star blue egg raids are worth seeking out:

• Powerful & Rare Bosses – Chance to battle and catch Pokémon otherwise not obtainable. Legendaries, megas, super strong starters/species.

• Better Rewards – More Premier Balls, Golden Razz Berries, Rare Candy, TMs, XP, Stardust per raid.

• Shiny Potential – Boosted shiny odds for certain bosses like legendaries (estimated 1 in 20).

• Medal Progression – Counts towards medal tiers for number of raids won and different tiers completed.

• Friendship Increase – Earn more friendship points with your Pokémon GO Friends by raiding together.

I‘d say the rare Pokémon and stellar rewards are the biggest perks. But it certainly helps that blue eggs also progress your medals and friendships!

How To Locate Those Coveted Blue Eggs

So how do you actually find these uncommon blue egg raids before the bosses hatch? Here are some tips I‘ve picked up from playing that maximize your chances:

• Check in-game News for raid focused events featuring blue eggs. These include Community Days, Raid Days, Raid Hours, etc.

• Scan the Gym photo discs visible on your map for a blue color. Toggle between map layers to cover more ground.

• Click into specific gyms to check if a blue egg sits atop it. Prioritize sponsored gyms.

• If you see any 4-star raids on Nearby or gyms in your view, head there immediately!

• Remotely join blue egg raids you see in global chat rooms and Discord servers.

• Use raid scanners or apps that pinpoint rare egg locations. I personally use Raidinator Prime and RadarGO.

• Connect with local players who can report blue eggs they find in your community.

With some diligent searching using these tips, you‘re bound to encounter more blue egg raids! They may still be rare, but remain vigilant.

Pokémon That Hatch From 4-Star Blue Eggs

Now let‘s discuss which epic Pokémon can hatch once those desirable blue eggs countdown to zero. Here are the major categories:

Legendary Pokémon

Some powerful legendaries that can hatch from blue eggs include:

• Mewtwo
• The legendary titans: Regirock, Registeel, Regice
• The legendary giants: Regigigas, Groudon, Kyogre, Rayquaza
• The legendary beasts: Raikou, Entei, Suicine
• The legendary birds: Articuno, Zapdos, Moltres
• The legendary golems: Regirock, Registeel, Regice
• The lake guardians: Azelf, Mesprit, Uxie
• Cresselia

Based on historical raid data, the overall legendary hatch rate from blue eggs is approximately 20%.

Mega Evolved Pokémon

Various mega evolved Pokémon also emerge from blue eggs, including:

• Mega Venusaur
• Mega Charizard X/Y
• Mega Blastoise
• Mega Pidgeot
• Mega Gengar
• Mega Houndoom
• Mega Aggron
• Mega Ampharos
• Mega Abomasnow
• Mega Aerodactyl
• Mega Slowbro

The mega hatch rate is around 22%.

Strong Fully Evolved Pokémon

Some powerful fully evolved Pokémon from blue eggs:

• Tyranitar
• Dragonite
• Machamp
• Gengar
• Gyarados
• Lapras
• Snorlax
• Salamence
• Metagross
• Blaziken
• Swampert
• Sceptile
• Gardevoir
• Slaking

These make up approximately 58% of blue egg hatches.

As you can see, blue eggs offer the chance to battle and catch some insanely strong Pokémon! I love the variety and excitement not knowing what exact boss will appear.

Blue Egg Raid Boss Statistics and Data

To give you a better idea of the Pokémon that hatch and their difficulty level, here are some key statistics about blue egg 4-star raid bosses:

• Average CP Range: 15,000 – 50,000+
• Shiny Rate: Approximately 1 in 20 overall
• 100% IV Rate: Roughly 1 in 4,000 (same as wild spawns)
• Average Base Capture Rate: 3% at Level 20, 5% at Level 25
• Species Breakdown: 58% fully evolved, 20% legendary, 22% mega evolved
• Top 5 Most Common: Tyranitar, Dragonite, Machamp, Gengar, Gyarados

These stats show blue egg bosses are certainly challenging. But with proper counters and techniques, they can absolutely be defeated and caught!

5 Pro Tips for Conquering Blue Egg Raids

Based on my own experience, here are 5 expert tips for dominating blue egg raid battles:

1. Assemble A Large Raid Party

I‘d recommend having at least 8 players, split into teams by optimal counter Pokémon types. The more players with top counters, the faster you‘ll win.

2. Max Out Your Raid Counters

Make sure your counters are high level (30-40) and have the perfect moves to exploit the boss‘s type weaknesses. Weather boosts make them even stronger!

3. Rejoin If Your Pokémon Faint

You can jump back into the raid an unlimited number of times while the battle timer lasts, so rejoin quickly if your party faints.

4. Attack in Sequence

When attacking, stagger your first Pokémon so one mon is always dishing damage while others recharge. This increases overall DPS.

5. Bring Plenty of Healing Items

Stock up on Max Revives, Potions and Berries so you can outlast the boss. I like to have at least 50 of each item before a major blue egg raid battle.

Follow these 5 tips and your raid squad will have what it takes to overcome any blue egg raid boss!

5 Expert Tips for Catching Blue Egg Bosses

Once you successfully defeat a blue egg raid boss in battle, you‘ll have a limited number of Premier Balls to try capturing it. Here are 5 pro tips to catch blue egg bosses:

1. Golden Razz Berries Are Your Friend

Feed the boss Golden Razz before every catch attempt to calm it down and make catching much easier.

2. Always Go For Excellent Curveball Throws

Excellent hits combined with curveballs maximize your catch chance. Be patient and aim carefully!

3. Consider The "Circle Lock" Technique

Wait for the boss‘s attack animation to finish before locking the circle, then throw when it reappears for easy excellence.

4. Switch Between Ball Types If Needed

If you run low on Premier Balls, use your stock of Great or Ultra Balls to finish the job.

5. Pray to RNGesus

Sometimes, luck is just not on your side. Keep calm and throw on! With persistence, you‘ll eventually succeed.

Stick with these 5 tips and even the toughest blue egg bosses will join your roster soon enough. Just stay patient and keep those Poké Balls flying trainers!

Parting Words on Blue Egg Raids

I hope this comprehensive guide has demystified 4-star blue raid eggs for you, courageous Pokémon trainer. Now you know what makes them special, where to find them, the epic bosses they hold, and how to beat the odds in battle.

While blue egg raids are quite uncommon, I think that rarity makes them all the more exciting. They really feel like a special in-game event.

So monitor those gyms closely, assemble your elite raid parties, and be ready to take on the mighty blue egg bosses as they arise. That satisfying victory will be so worth all your effort.

Thanks for reading and happy raiding, trainer! With the knowledge you now have about blue eggs, you‘re sure to conquer them all. Gotta hatch ‘em all!