Trainability is how much training capacity remains trying to achieve the following values.
If negative, you can't achieve these values
HP = 12
Attack = 3
Ability:

• Hack = 800
• Rush = 100 (using average toys in all the slots). The train value shown, is what remains after training for 100% rush
  • In parenthesis is if you didn't train for 100 rush
  • Using 12% for shirt, 15% for hand, 16% for pants, 18% for hats and 14% for accessory
• Dismantle = 6.5
• Repair = 6
• Gas = Critical = 12
• Healing Rain = 6
• First Aid (Tank): Ability + HP = 27

The columns starting with an i are indices. For instance iAttack, is an index of their attack abilities. The iSpecialist is the max skill no toys are being considered. iTank considers training mainly for HP