The Superhero Database Classification number, or SHDB Class, is a number that represents the overall 'power' of a character. All traits of a character are used for calculating the Classification.
What it DOESN'T mean
This doesn't mean that a higher class would always beat a lower class character. But the bigger the difference in Class is, the more obvious it is who'll win in a fight.
How is this calculated
( INT^1.3 + (STR*0.5 )^2 + (SPE*0.5)^2 + DUR^1.6 + (POW + (SPS*SPL))^2 + COM^1.8 ) ^ TIER
Super Power Score and Level
Every Super Power has a score (SPS) that is used to calculate the Class. Each Super Power also has 3 levels (SPL). The level is set when connecting that Super Power to a character. The level determines the final score, of the Super Power, being used in the calculation.
He also changes into a wolf and his heart/belly becomes cartoonishly huge in parts of the movie. Dorian also sucks bullets out of his body and machine gun fires them at the crime boss. Never read the comic, but the movie says that the wearer can pretty much do anything that they can also imagine/confidently will(Ipkiss was mild mannered, so his confidence was lacking). I don't think Stanley maximizes it. I think you need Hal Jordan for that, but there's a lot of reality warping going on.