Whitney got my vote. Clair is close behind though.
These are the most annoying Pokemon of the gym leaders:
Falkner: Not too hard, never really had trouble. His hardest is obviously Pidgeotto.
Bugsy: Scyther, No questions.
Whitney: MILTANK.
Morty: Gengar. He isnt too troubling, but his Gengar can be annoying.
Jasmine: Steelix is a pain, especially at Lv 35. Her magnemites with thunderwave? Annoying.....But Steelix tops it.
Chuck: His Poliwrath is the hardest.
Pryce: His dewgong and Piloswine are as bad as each other, But not too troubling.
Clair: KINGDRA.
Top 3 hardest leaders:
Whitney (That d*mn Miltank :cer_pissed:)
Clair (That d*mn Kingdra :cer_pissed:)
Bugsy (....Scyther = annoying :cer_pissed:)