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.
Anti-Gravity: (Attack Gravity allows levitation) and Gravity control (Still Attack Gravity).
Cold Resistance: (Type: Steel (Resistant to Ice Type attacks) and Dragon)
Durability: (Steel Type's durability or defense in Pokemon including this one's is pretty high.)
Electrokinesis: (Attack: Thunder Wave, Shockwave.)
Fire Control: (Attack: Overheat, Flamethrower, Fire Blast..., ...)
Heat Generation: (Attack: Overheat, ..., ...)
Higher Dimensional Manipulation: (Dialga has control over time, so...)
Hypnokinesis: (Attack: Rest.)
Intelligence: (I'd say, because it can use its powers well, against Palkia in a comic, he was able to use its powers well.)
Levitation: (Attack: Magnet Rise, Gravity. Gravity permits the ability 'levitate'.)
Magic Resistance: (Magic attacks in Pokemon are basically Psychic type attacks, who Dialga has a resistance to.)
Paralysis: (Attack: Thunder, Thunderbolt.)
Seismic Powers: (Attack: Ancient Power.)
Status Effect Inducement: (Read: Paralysis above.)
Terrakinesis: (Attack: Earth Power.)
Toxin And Disease Control: (Attack: Toxic.)
Toxin And Disease Resistance: (LOL!!! Dialga is IMMUNE to poison.)
Water Control: (Read: Below.)
Weather Control: (Read: Below.)