So ,what if instead of Rock and Steel types always having the same effectiveness against one another, what if they had a "Hardness" rating from 1 to 10. Rock and Steel types using rock and Steel attacks against other Rock and Steel types with lower Hardness are super effective. Rocks and Steel types using rock or Steel attacks against enemies with greater hardness are not very effective. If they have equal hardness it' a neutral hit. Pokemon who aren't Rock or Steel type and just using it as a coverage move have a Hardness of 0 and if a pokemon uses Stealth rock, it counts as being of the hardness of the pokemon that used it (so you generally want very hard rock or steel types using that move and it;s disadvantageous to have pokemon that aren't Rock or Steel to use it).

Pokemon that would have high Hardness would be things like Diancie, Onix, Steelix, Aegislash, and Gigalith.

Pokemon with a low Hardness would be things like Skarmory (one of its abilities is Weak Armor, after all), Heatran (its body is partially melted), Crustle, and Corsola.

Some pokemon might even gain or lose hardness as they evolve. For instance, Larvitar might have a Hardness of 3 for instance, evolve into a Pupitar ad have Hardness 8, and then Evolve into Tyranitar with Hardness 7.

What do you think? Super autistic?