Catch a Monster Fusion Guide: How to Rank Up Monsters from E to A Tier

The Fusion System is the most important progression mechanic in Catch a Monster. It's the primary method for upgrading your monsters from common E tier all the way up to legendary A tier. Whether you're a new player trying to build your first strong team or a veteran optimizing your fusion chains, this comprehensive guide will teach you everything you need to know.

What is the Fusion System?

Fusion is the process of combining multiple monsters of the same tier to create a single monster of a higher tier. This is a core gameplay loop in Catch a Monster that rewards consistent farming and strategic planning.

The Basic Formula:

5 Same-Tier Monsters + Coins = 1 Higher-Tier Monster

For example, if you fuse 5 E-tier monsters together, you'll receive 1 D-tier monster in return. This process can be repeated all the way up the tier ladder.

Where to Access the Fusion System

The fusion system is located at the Pet Center on Starter Island. Here's how to find it:

1. Spawn on Starter Island - If you're on another island, return to the spawn point
2. Look for the Pet Center building - It's near the central area
3. Enter and interact with the NPC - Select the "Fuse" option
4. Choose your fusion materials - Select 5 monsters of the same tier
5. Confirm and pay - The fusion will complete instantly

The Pet Center also offers other services like monster storage and viewing your collection, so it's a hub you'll visit frequently.

Complete Fusion Cost Breakdown

Fusion costs coins, and the price increases as you upgrade to higher tiers:

Calculating Total Cost: E to A Tier

Let's calculate how many E-tier monsters and coins you need to create ONE A-tier monster:

• 5 E-tier → 1 D-tier (100 coins) × 5 = 25 E-tier, 500 coins for 5 D-tier
• 5 D-tier → 1 C-tier (300 coins) × 5 = 125 E-tier, 2,000 coins for 5 C-tier
• 5 C-tier → 1 B-tier (700 coins) × 5 = 625 E-tier, 5,500 coins for 5 B-tier
• 5 B-tier → 1 A-tier (1,500 coins) = 3,125 E-tier, 9,000 coins for 1 A-tier

Total for 1 A-tier monster from scratch:

• 3,125 E-tier monsters
• Approximately 17,000+ coins

This might seem daunting, but remember that you don't need to start from E-tier every time – you'll catch higher-tier monsters naturally through gameplay!

The Shiny Preservation Mechanic

One of the most important fusion features is shiny preservation. Here's how it works:

If ANY of the 5 monsters used in fusion is shiny, the resulting monster will ALSO be shiny!

This means:

1. Catch any shiny monster - Even an E-tier shiny is valuable
2. Fuse it with 4 normal monsters - The result keeps the shiny status
3. Repeat through all tiers - Eventually get an A-tier shiny!

Shiny Fusion Strategy

1. Never sell or waste shiny monsters - They're incredibly valuable
2. Fuse shinies immediately - The sooner you upgrade, the sooner you have a strong shiny
3. Use 1 shiny + 4 normals - This is the most efficient method
4. Target specific species - If you want a shiny Glazadon, only fuse fire/ice types

Pro Tip: Shiny status is determined by presence, not quantity. Using 5 shiny monsters in one fusion is wasteful – you only need 1 shiny to guarantee a shiny result!

Fusion Rules and Mechanics

Understanding these rules will help you make better fusion decisions:

Rule 1: Same Tier Required

All 5 monsters must be the exact same tier. You cannot mix E and D tier in the same fusion.

Rule 2: Species Doesn't Matter

The 5 monsters can be any species! You could fuse:

• 5 Treemos
• 3 Treemos + 2 Woodliz
• 5 completely different species

The result will be a random monster from the pool of possible results.

Rule 3: Random Result Species

The species of the resulting monster is random (from available species at that tier). The game does not consider what species you put in.

Rule 4: Fusion is Instant

Unlike eggs, fusion completes immediately. There's no wait time once you confirm.

Rule 5: Cannot Undo Fusion

Once you fuse, the 5 input monsters are permanently consumed. Make sure you're fusing the right ones!

Optimal Fusion Strategies

Here are the most efficient approaches to fusion:

Strategy 1: The Continuous Farm

This is the most efficient method for dedicated players:

1. Pick a high-spawn area (Starter Island grasslands)
2. Catch everything you see
3. Immediately fuse any E-tier monsters into D-tier
4. Keep fusing D-tier into C-tier as they accumulate
5. Continue the chain upward

Advantages: Maximizes storage efficiency, constant progress Best for: Players who want to grind efficiently

Strategy 2: The Batch Method

For players who prefer organized sessions:

1. Farm and accumulate monsters without fusing
2. When storage is nearly full, do a massive fusion session
3. Calculate exactly how many of each tier you'll get
4. Plan which monsters to keep vs. fuse

Advantages: Less frequent Pet Center visits, easier to plan Best for: Players who like to batch their activities

Strategy 3: The Targeted Approach

For players seeking specific results:

1. Identify which high-tier monsters you want
2. Research which species are in the fusion pool at that tier
3. Only fuse when you have monsters that could result in your target
4. Save shiny monsters for your desired species

Advantages: Better chance at specific monsters Best for: Collectors and min-maxers

Common Fusion Mistakes to Avoid

Learn from these common errors:

Mistake 1: Fusing Shinies as Fodder

Never use a shiny monster as one of the 4 non-essential slots. Always use exactly 1 shiny with 4 normals.

Mistake 2: Fusing Rideable Mounts

Don't accidentally fuse your Aquron! You need it to travel between islands.

Mistake 3: Not Checking Storage First

Before mass-catching for fusion, ensure you have enough storage space.

Mistake 4: Ignoring Boss Eggs

Boss eggs can give you high-tier monsters directly, reducing the need for fusion.

Mistake 5: Rushing to Fuse Everything

Keep at least one good team for content clearing while you farm fusion materials.

Fusion and Game Progression

Here's how fusion fits into your overall progression:

Early Game (New Player)

• Focus on E → D fusion
• Build a team of D-tier monsters
• Don't worry about higher tiers yet

Mid Game (Level 15-25)

• Push for C-tier through fusion
• Start collecting for B-tier
• Consider luck game passes for better catches

Late Game (Level 25-40)

• Fuse toward A-tier main team
• Optimize shiny fusion chains
• Farm boss eggs for direct A-tier drops

End Game

• Complete A-tier team
• Hunt for shiny A-tiers
• Prepare for S-tier (future updates)

Fusion Math: Quick Reference Tables

E to D Tier Requirements

Full Fusion Chain to A-Tier

Frequently Asked Questions

Q: Can I choose what monster I get from fusion? A: No, the result is random from the available species at that tier.

Q: Does the species I fuse affect the result? A: No, species input doesn't affect species output.

Q: Can I get S-tier from fusion? A: Currently, the highest tier achievable through fusion is A-tier.

Q: Is fusion worth it compared to catching high tiers? A: Yes! Fusion is the most reliable way to get high-tier monsters. Catching A-tier is very rare.

Q: Should I save coins or use them for fusion? A: Fusion is the best use of coins. Prioritize it over other purchases.

Conclusion

The fusion system is the backbone of progression in Catch a Monster. By understanding the mechanics, costs, and strategies outlined in this guide, you can efficiently build a powerful team of high-tier monsters.

Remember these key takeaways:

• Fuse consistently – don't let E-tiers pile up
• Preserve shinies – they're your path to shiny A-tiers
• Plan your coins – know the costs before you need them
• Have fun – the grind is part of the journey!

For more information on monster stats, check our Tier System Guide. To find the best farming spots, see our Monster Locations Guide.