2026-06-10
Refresh this page after new codes, new trainers, new pets, rank changes, or repeated Discord/community reports.
Gym Star Simulator Tier List
Compare the safest code reward, trainer watch picks, pet value candidates, and Muscle Factory update items before spending spins, boosts, or trade value.
Rank speed, boost value, trade risk, and update freshness
Compare picks by rank-push value, trainer impact, pet value, unlock cost, source strength, and replacement risk.
Confidence labels: official, reported, older, and needs-check
Treat official Roblox text as strongest. Older guides and value lists help spot candidates, but exact ranks still need rechecks.
Rankings
Best current picks and watchlist
Use the S and A entries first, then treat Watch entries as update leads until current trainer stats and pet values are confirmed.
SSource-backed
OVERDRIVE spins first
Rank push setup
free spinsearly rank push
The official Roblox page lists OVERDRIVE for 8 wheel spins, so it is the safest first action before comparing trainers or pets.
Player note: Use spins before a planned training session so the reward can affect your next rank push.
Source check: Official Roblox page checked 2026-06-29.
AOlder community data
Planet Samurai trainer
Trainer watch
rank pushingcompetition rewards
Older guide evidence describes Planet Samurai as a strong muscle-growth and competition-reward trainer. Keep it high-priority but not final until current stats are checked.
Player note: Do not spend rare resources on a trainer upgrade until the current multiplier is confirmed.
Source check: Sportskeeda beginner guide is older and needs a current in-game or Discord recheck.
AOlder community data
Cosmic Dragon pet
Pet value watch
trading valuecollection
Older value-list evidence puts Cosmic Dragon among notable high-value pets. Treat it as a trade watch item until the post-update market is checked.
Player note: Use the pet value as a discussion starter, not a final trade price.
Source check: Pro Game Guides value list is older community evidence.
WatchNeeds check
Muscle Factory trainers
Current update
new updaterank push
The official page confirms new trainers in the Muscle Factory update, but names and multipliers still need verification.
Player note: Check Discord or in-game trainer panels before ranking them above older picks.
Source check: Official Roblox update text confirms new trainers, not their stats.
WatchNeeds check
Exclusive Muscle Factory pets
Current update
event petstrading watch
The official page confirms exclusive pets in the update, so they belong on the watchlist before any exact value claim.
Player note: Wait for hatch pool and trade evidence before treating any one pet as best.
Source check: Official Roblox update text confirms exclusive pets, not names or values.
Code reward priority
Use source-backed codes first, then decide whether spins and boosts support a rank push.
Trainer priority
Rank trainers by muscle gain, competition reward value, unlock cost, and current-update evidence.
Pet value priority
Rank pets by trade demand, event freshness, and whether current values are still reliable.
Update watch
Muscle Factory changed the watchlist
The official page confirms a new gym, new trainers, exclusive pets, new ranks, season quests, boost events, and OVERDRIVE. Exact trainer and pet rankings wait for current data.
Guide
Plan rank pushes
Use guides for boost timing, trainer checks, and when to chase the next rank.
WikiCheck pets and trainers
Use wiki pages for unlock paths, trade notes, trainer roles, and current update watch items.
SourcesCheck evidence
Use source notes when creator videos, wiki pages, or community reports disagree.