Catch a Monster is a monster-catching RPG on Roblox by LDS II. You catch wild monsters, team up your favourites, and fight through zones, dungeons, rifts, and bosses to catch rarer and stronger monsters still. This guide walks a brand-new player through the core loop and the handful of systems that actually decide how fast you progress — rarity, elements, and ranks — then points you at the tools that do the planning for you.
What you're actually doing
Strip away the detail and Catch a Monster is one loop repeated at higher and higher power levels:
- Catch monsters. Each zone is home to different monsters. You encounter them as you explore and add them to your collection.
- Build a party of three. You fight with exactly three pets at a time, so the game is less "collect one god pet" and more "assemble a balanced trio."
- Fight content to grow. Clear zones, take on the Delve Trials dungeons, run Rifts, and hit the timed bosses that spawn every 15 minutes.
- Rank up and evolve. Pets gain power as their rank climbs from E to SS, and many evolve into stronger forms. Stronger pets unlock harder content, which drops better rewards — and the loop repeats.
Almost every decision below is really about doing one lap of that loop faster.
Rarity: Common to Void
Every monster has a rarity, and it's the quickest read on how hard a pet is to get and how much ceiling it has. From most common to rarest:
Common → Uncommon → Rare → Epic → Legendary → Mythic → Secret → Void.
Higher rarity generally means higher base stats and lower drop chance, with Secret and Void sitting at the top as the true chase pets. That said, rarity is not the whole story — a well-ranked Mythic can out-perform a low-rank Secret, and the community tier list often disagrees with the rarity order. Use the pet wiki to compare any two monsters' stats side by side instead of assuming the rarer one wins.
Elements and why coverage matters
Every pet belongs to one of six elements: Normal, Grass, Water, Fire, Ice, and Ground. Because you field three pets at once, the smart move is rarely three of the same element — it leaves you exposed to anything that resists that element. A party that spreads its damage across a couple of elements can threaten far more of the content you'll face.
You don't have to work the matchups out by hand. The Team Builder shows your party's element coverage as you add pets, and the Team Building guide walks through sample trios for early, mid, and late game.
Ranks: the E → SS multiplier
This is the system new players underrate most. A pet's rank — E, D, C, B, A, S, or SS — is a multiplier on its stats. The same monster at SS hits dramatically harder and survives far longer than it does at E, so a higher-rank common pet can beat a lower-rank rare one. Chasing rank on a pet you already like is often a better use of time than catching yet another fresh low-rank monster.
Every pet page on the wiki shows that pet's stats at each rank, and the Rank System guide breaks down exactly how much each step multiplies damage and HP.
Redeem codes on day one
Before anything else, grab the freebies. The developers drop codes that redeem in-game for free coins and eggs — a real head start when you're building your first roster. We keep a live list of working codes (and clearly mark the expired ones) on the Catch a Monster codes page, updated as new codes are announced. Redeem the active ones, then check back after big updates and holidays, which is when most new codes appear.
Bosses, dungeons, and rifts
Once you have a working party, the timed content is where the better rewards live:
- Bosses spawn every 15 minutes, on the clock (at :00, :15, :30, and :45 past the hour), across the zones — Volcano, Frost Isle, Tideland, Blossom Haven, and the rest. The Boss guide covers the schedule and zones, and Server Hop helps you jump into a fresh server timed to a spawn.
- Delve Trials are the dungeons, with Easy, Hard, and Nightmare difficulties for up to four players.
- Rifts are co-op encounters for up to four players — good loot, better with a group.
Common beginner mistakes
- Ignoring rank. Catching a fifth low-rank pet rarely beats ranking up the one you already field. Power comes from rank as much as from rarity.
- Running three of one element. It feels strong until you hit something that resists it. Spread your coverage.
- Skipping codes. Free coins and eggs compound early — redeem them before you grind for the same rewards.
- Over-investing in a starter before checking the wiki. A two-minute look at the tier list can save hours sunk into a pet that falls off.
Where to go next
You now know the loop. To go deeper: read the Rank System guide to understand the stat math, the Team Building guide to assemble your first real party, and the Evolution guide for when and how to evolve. When you're picking pets, the wiki and community tier list are the two tabs you'll keep open.