Welcome to the community. 
First of all, I split your post from the thread you originally posted on. That thread was from four years ago and features a version of WeMod that no longer exists, due to updates and improvements over the years. Please be mindful before posting in older threads.
If enough WeMod members have the game, then WeMod will detect its existence automatically and add it to the WeMod library. WeMod doesn’t just add every game in existence to its library, as otherwise the library would be spammed and cluttered with broken and abandoned games.
You can follow and contribute to the discussion in regards to those two games here: KINGDOM HEARTS FINAL MIX Cheats and Trainer for Steam.