Trainers
Every trainer the community wiki documents, with its bonus and how to unlock it.
Trainers give a percentage bonus to muscle growth, stamina growth, competition winnings or egg luck, and unlike pets their bonus is a flat percentage rather than a multiplier. The game contains 54 trainers of which 18 are currently obtainable — but the community wiki only documents 5 of them in full, and those are the rows below. We are not going to fill the gap with guesses.
| Name | Location | Price/Requirement | Obtainable | Bonus |
|---|---|---|---|---|
| Mike | Trainer Shop | 100$ | Yes | +20% Muscle Growth |
| Lina | Daily Rewards | Day 2 Reward | Yes | +20% Stamina Growth |
| Jenny | Trainer Shop | Rank 2, 5K$ | Yes | +20% Competition Bonus |
| Rock | Trainer Shop/Robux Shop | 699R | Yes | +100% Muscle Growth |
| Sweatmax | Daily Rewards | Day 4 Reward | Yes | +20% Luck Bonus |
- Percentages are the trainer's own bonus and stack with your pets.
- Trainers listed as not obtainable came from past events and cannot be bought now.
- The wiki records 54 trainers in total; only 5 have complete entries.
Rows compiled from Gym Star Simulator Wiki (Fandom), last read Aug 25, 2026. Community sources can be wrong or out of date; the sources page explains how we weigh them.