Gym Star Simulator Tier List (2026) — Best Trainers Ranked

Gym Star Simulator by Gym Simulator Club has pulled in over 564.8 million visits on Roblox since its August 2024 launch, and with roughly 10,100 concurrent players and a 92.9% approval rating, it's clear that the bodybuilding grind has staying power. At the core of your progression are trainers — characters you equip that directly boost your Muscle Growth, Stamina Growth, and Competition Bonus stats. Picking the right one can cut hours off your grind.

This tier list ranks every trainer currently available in Gym Star Simulator as of April 2026, including additions from Update 35's "Bad Bunny" event. We've evaluated each trainer based on raw stat bonuses, how many stats they cover, and how accessible they are to different types of players. Whether you're a free-to-play grinder or someone willing to spend Robux, you'll find your best option below.

S Tier — Best Trainers in Gym Star Simulator

S Tier trainers offer the highest stat ceilings in the game. These are the ones that experienced players actively chase, and equipping either of them will noticeably accelerate your progression across multiple training areas. Both are harder to obtain than anything in lower tiers, which is exactly why they hit so much harder.

Planet Samurai (+120% Muscle Growth, +50% Competition Bonus)

Planet Samurai is the single strongest trainer in Gym Star Simulator as of April 2026. Its +120% Muscle Growth bonus is the highest raw muscle stat in the entire game, and the +50% Competition Bonus on top of that makes it a dual-stat powerhouse. No other trainer comes close to matching that combination of raw strength gains and competition rewards.

You can only obtain Planet Samurai through the Spin Reward system, and it sits in the rare drop pool. That means you'll need either a stockpile of Spins or a decent amount of patience. Many players burn through hundreds of Spins before landing it. But once you do, it becomes the default trainer for virtually every situation — strength training, competition events, and general progression all benefit from its stat spread.

The +50% Competition Bonus is particularly valuable in the mid-to-late game, where competition rewards scale significantly. Pairing Planet Samurai with Giant Gym equipment like the Colossal Bench Press (5x multiplier) creates one of the fastest strength-building setups possible. If you're serious about climbing the leaderboards, this is the trainer to target.

Golden Shark (+110% Muscle Growth, +100% Stamina Growth)

The Golden Shark takes a different approach to S Tier dominance. Rather than splitting between muscle and competition, it stacks massive bonuses in both Muscle Growth (+110%) and Stamina Growth (+100%). That makes it the best trainer for players who want balanced stat progression without sacrificing either core training stat.

Golden Shark is an Ocean Event exclusive that costs 26,000 Shells to purchase. Shells are the event-specific currency, so you'll need to grind the Ocean Event content efficiently to accumulate enough. It's a steep price, but the investment pays off immediately. Having +110% Muscle and +100% Stamina running simultaneously means every training session pushes both stats forward at roughly double the rate of most other trainers.

Where Golden Shark really pulls ahead is in the rebirth system. Because rebirths grant permanent multipliers based on your overall stat totals, training both Muscle and Stamina at high rates means you hit rebirth thresholds faster and with better overall stat distributions. For long-term account growth, Golden Shark is arguably even more valuable than Planet Samurai.

A Tier — Excellent Trainers

A Tier trainers are strong enough to carry you through the majority of the game's content. They don't quite match S Tier's raw numbers, but they're more accessible and still provide meaningful stat boosts. Most players will spend the bulk of their time with an A Tier trainer equipped before upgrading to S Tier options.

Rock (+100% Muscle Growth)

The Rock trainer delivers a clean +100% Muscle Growth bonus with no secondary stats. It's a straightforward pick: you equip it, and your muscle gains double. At 599 Robux through the premium shop, it's also the most accessible high-tier trainer available since you don't need to wait for events or grind spin currency.

The downside is obvious. Rock lacks any Stamina Growth or Competition Bonus, which means you're trading versatility for pure muscle power. That's perfectly fine during early and mid progression when raw strength is the bottleneck, but it starts to feel limiting once you need balanced stats for later worlds and the rebirth system. For players who want to buy their way past the early grind, Rock is a reliable option that holds its value for a long time.

Poseidon Descendant (+100% Muscle Growth, +50% Stamina Growth)

Poseidon Descendant matches Rock's +100% Muscle Growth and adds +50% Stamina Growth on top. That secondary stat makes a real difference in overall progression speed, especially once you've unlocked the 4th and 5th gym worlds where stamina requirements start gating your access to higher-tier equipment.

The catch is availability. Poseidon Descendant was a limited purchase offering, meaning it appeared in the shop during a specific window and hasn't returned as of April 2026. If you missed it, you can't currently obtain this trainer. For players who do own it, Poseidon Descendant sits comfortably between the A Tier single-stat trainers and the S Tier dual-stat ones. It's one of the best all-around trainers for players who aren't ready to grind for Golden Shark or chase Planet Samurai spins.

WuKong (+90% Stamina Growth, +20% Competition Bonus)

WuKong is the premium stamina specialist. Its +90% Stamina Growth is the highest stamina-focused bonus you can buy outright, and the +20% Competition Bonus provides a small but welcome bump to competition rewards. At 899 Robux, it's the most expensive gamepass trainer, but the stats justify the price if stamina is your bottleneck.

WuKong fills a specific niche that no other trainer covers as well. In the later stages of progression, particularly around the 5th and 6th gym worlds, stamina becomes the primary limiter. Equipment like the Massive Treadmill (2x multiplier) in the Giant Gym pairs well with WuKong's stamina focus. Players who've already invested in a muscle-focused trainer like Rock often pick up WuKong as their second trainer to swap in when stamina training is the priority. Check our Gym Star Simulator free Robux guide for ways to offset that Robux cost.

B Tier — Solid Trainers

B Tier trainers are workhorses. They won't blow you away with their numbers, but they provide consistent value across the mid-game and remain useful even after you've unlocked higher-tier options. These are the trainers most free-to-play players will rely on for the longest stretch of their progression.

Shark (+80% Muscle Growth, +70% Stamina Growth)

The Shark trainer is the budget version of Golden Shark, available during the Ocean Event for a lower Shell cost. Its +80% Muscle Growth and +70% Stamina Growth stats are respectable, providing solid dual-stat coverage that keeps both training tracks moving forward at a good pace.

For players who can't afford the 26,000 Shells needed for Golden Shark, Shark is the next best option from the Ocean Event. The stat difference between Shark and Golden Shark is roughly 30% on each stat, which matters at the highest levels but won't hold you back during the first several worlds. If you're still progressing through the mid-game, Shark does the job well.

Garry (+80% Stamina Growth, +30% Competition Bonus)

Garry is available as a shop purchase and provides a strong stamina-focused stat line. The +80% Stamina Growth puts it close to WuKong's territory, and the +30% Competition Bonus is actually higher than WuKong's +20%. What drops Garry to B Tier instead of A is the complete absence of any Muscle Growth bonus.

That said, Garry is one of the better free-to-play options for players who've already handled their muscle training needs with belt crafting or equipment multipliers. The combination of stamina and competition stats makes Garry particularly useful during competition events where both endurance and bonus rewards matter.

Simeon (+50% Muscle Growth, +20% Competition Bonus)

Simeon is another shop purchase trainer that provides a modest but useful stat spread. The +50% Muscle Growth won't turn heads next to Rock's +100%, but the added +20% Competition Bonus gives Simeon some extra utility that pure-muscle trainers at this level lack.

Simeon works best as a transitional trainer. It's cheap, accessible, and covers two stats at once. Players who are saving their Spins for Planet Samurai or grinding Shells for Golden Shark will find Simeon a perfectly adequate placeholder that doesn't leave any major stat gaps. For more ways to speed up your progression, check our Gym Star Simulator codes page for active codes.

C Tier — Starter Trainers

C Tier trainers are the ones you'll pick up naturally through early progression. They provide small but meaningful boosts during the first few hours of gameplay. You'll eventually replace all of them, but they serve their purpose as stepping stones while you work toward higher-tier options.

Nail (+40% Muscle Growth)

Nail is your Day 7 Login Reward, which means every player who sticks with the game for a week gets access to it. The +40% Muscle Growth is decent for a free trainer and represents a noticeable upgrade over the two trainers below it on this list. It's the best C Tier option and worth using until you can afford something from B Tier or above.

The main limitation is that Nail is a single-stat trainer with no stamina or competition bonuses. By the time you hit the 3rd or 4th gym world, you'll feel the absence of those secondary stats. Still, Nail carried plenty of players through the early game, and the fact that it's completely free makes it hard to criticize.

Mike (+20% Muscle Growth)

Mike costs just 100 Cash in the shop, making it the cheapest trainer you can buy. The +20% Muscle Growth is minimal, but for brand-new players who haven't hit their Day 7 login yet, Mike provides an immediate boost over having no trainer equipped at all. Think of Mike as training wheels — it gets you started and then you move on.

Lina (+20% Stamina Growth)

Lina arrives on Day 2 of your login streak, making it one of the first trainers most players receive. The +20% Stamina Growth is small, but stamina matters from the very beginning since it determines how long you can train before needing to rest. Lina's value drops off quickly as you progress, but she's a welcome early-game addition.

Jenny (+20% Competition Bonus)

Jenny unlocks when you rank up twice, making it accessible within the first hour or two of gameplay. The +20% Competition Bonus is niche at this stage since early competition events don't offer massive rewards. Jenny is the most situational C Tier trainer — you'd only equip her specifically before entering a competition event, and even then, the +20% bump produces marginal returns until your base stats are high enough to make the percentage meaningful.

Tier List Summary Table

Here's a quick-reference table covering every trainer ranked in this list. Use this for at-a-glance comparisons when you're deciding which trainer to equip or save for.

For context on how trainers interact with equipment, here's a breakdown of the Giant Gym equipment multipliers introduced in Update 31. These stack with your trainer's stat bonuses, so a stronger trainer amplifies the effect of every piece of equipment you use.

How We Ranked These Trainers

Our rankings are based on four factors: total stat value, stat coverage, accessibility, and practical impact on progression as of April 2026. Total stat value is the sum of all percentage bonuses a trainer provides. Planet Samurai's combined +170% across two stats (120 + 50) edges out Golden Shark's combined +210% (110 + 100) in raw totals, but Planet Samurai's muscle bonus being the highest single stat in the game and its competition utility give it the overall S Tier lead.

Stat coverage matters because trainers that boost multiple stats provide more efficient progression. A trainer with +100% in one stat is useful, but a trainer with +80% in two stats often produces better long-term results thanks to the rebirth system's reliance on overall stat totals. That's why Golden Shark and Poseidon Descendant rank above trainers with equivalent or even slightly higher single-stat bonuses.

Accessibility factored into tier boundaries but not into placement within a tier. A trainer that costs 899 Robux needs to justify that price tag with strong stats, and WuKong does. Similarly, free trainers like Nail and Mike earn their C Tier spot because their stats reflect their zero cost — adequate for early game, outclassed by mid game.

We tested every trainer across multiple gym worlds, including the Giant Gym from Update 31 and the latest Update 35 content. Equipment multipliers, belt bonuses from Enchantment Crystal crafting, and pet system interactions were all considered when evaluating real-world performance. For a broader look at the game and additional strategies, visit our Gym Star Simulator hub page.

Frequently Asked Questions