There’s no legit trainers out there that are working and the other ones that are out there require payment and seem to be from dodgy sites, and this game /really/ needs a legit one. Please can it be made 
Hello and thank you for taking the time to make a suggestion. 
However, we don’t take forum requests for trainers.
Trainers are made based on the game’s popularity within the community. This is determined by:
- How many WeMod members have the game installed. The WeMod software detects this automatically.
- How many WeMod members are following or have it added as a favourite.
To follow the game, click “Notify Me” on the game’s page in the WeMod software.
To favourite a game, click the star icon next to the trainer’s name in the WeMod software. - The number of boosts put into the game by Pro members to boost it further up the development queue when it appears there due to being determined as popular via the previous points.
- You can learn more about this trainer developing/updating system here: Game Queue & Boosts - WeMod Support.
- You can find the game in the WeMod library via the WeMod software and here: Rival Stars Horse Racing: Desktop Edition Cheats and Trainers for PC - WeMod.