The values started becoming inconsistent and skewed in Generation 2 and Beast Wars, when Hasbro apparently thought no child will ever want a toy that is described as anything less than perfect. Thus it became rarer and rarer to see any low numbers. Most characters' numbers hardly ever dipped below 8, the Go-Bot version of Optimus Prime was the first character to have all values at 10, a trend that would repeat for most "leader" characters. When even more powerful versions of the Optimus Primal toy (such as Optimal Optimus) were introduced, Hasbro even invented a "10+" rating in an attempt to keep increasing the power levels. With the Transformers: Cybertron line a few characters even got "Unknown" and "Infinity" ratings.