Mazz thats a great point on Bunny, getting something safely in is very similar to Victini,where it just nukes everything. But, the thing with Bunny is that it doesnt even need more coverage to be effective, as was the case with Tiniwho could nuke stuff with VC and pick off the stragglers with its coverage moves. People are going to argue that Bunny is frail and easy to pick off,.but it has the movepool to get around its checks and counters with just SD, Agility, QA, Return and Earthquake. These 5 moves allow it to beat faster offensive teams, tear through stall, beat non espeed priority users, etc..
On the flip side (to be fair), Sableye is immune to its priority move and can WoW before it attacks (But still takes almost 50% from even burned adamant non LO earthquake).
252+ Atk Huge Power burned Diggersby Earthquake vs. 252 HP / 4 Def Sableye: 133-157 (43.7 - 51.6%) -- guaranteed 3HKO after Leftovers recovery
But, Bunny can easily run Lum Berry as pointed out before so eh. another poke that can check Bunny who isnt named Mismagius or Zong is Chesnaught.
252+ Atk Huge Power Diggersby Return vs. 252 HP / 252+ Def Chesnaught: 135-160 (35.5 - 42.1%) -- 91% chance to 3HKO after Leftovers recovery
4 Atk Chesnaught Wood Hammer vs. 4 HP / 0 Def Diggersby: 342-404 (109.6 - 129.4%) -- guaranteed OHKO
+2 252+ Atk Huge Power Diggersby Return vs. 252 HP / 252+ Def Chesnaught: 270-318 (71 - 83.6%) -- guaranteed 2HKO after Leftovers recovery
Chesnaught still has a 44% chance to survive the +2 Adamant LO Return as well...
+2 252+ Atk Life Orb Huge Power Diggersby Return vs. 252 HP / 252+ Def Chesnaught: 351-413 (92.3 - 108.6%) -- 56.3% chance to OHKO
Physically Defensive Hippo is ok too, but can barely 2hko bunny...
+2 252+ Atk Life Orb Huge Power Diggersby Return vs. 252 HP / 252+ Def Hippowdon: 360-425 (85.7 - 101.1%) -- 6.3% chance to OHKO
I suppose Zygarde SubCoil can theoretically check bunny, but bunny can boost faster than ziggy, so idk.