How can nobody mention Volcarona? Well alright here I go.
Volcarona @ Firium Z
Ability: Flame Body
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Quiver Dance
- Fire Blast
- Giga Drain
- Hidden Power Ground
The most famous case of stealth rock weakness(barring Charizard) is Volcarona. Put simply, as well all know this, Volcarona
needs to have defog support on any team that chooses to use it. I don't believe that the core it forms with Scizor is necessarily that amazing defensively, but the best cores never are(i.e ORAS's Talonflame Pinsir core). Not to mention that once rocks are away, Scizor can easily U-turn out on any Pokemon it wishes to bring in Volcarona. Generally, Scizor will not lure out rock type Pokemon fearing its bullet punch but rather steel types seeking to wall it. Steel types are forced out by Volcarona, as it sets up a quiver dance preparing for a potential sweep. Volcarona is a Pokemon that has the bulk to set up on several special-attacking Pokemon, as well as have the power to force out a variety of threats, but even then physical attacks(barring the defensive set) and super-effective moves can prove troubling for the moth. One of these options however, is covered mostly by Mega Scizor's exceptional physical bulkiness. While Volcarona's 85/65 physical defenses might not be enough to set up in the face of powerful physical attackers, Scizor's whopping 140 base defense is enough to switch in on physical attackers that threaten Volcarona's paper thin defense. This of course isn't to mention Volcarona's bulkier set, which I'm not focusing on at the moment.
While no real type synergy based off of weaknesses and resistances exist between the two Pokemon, that isn't enough to say that an offensive pairing, or even defensive pairing based off of their respective but contrasting stats, between the two is out of the question.