I wonder if Liza & Tate are easiest Gym Leaders in Pokémon Ruby. I defeated them with two moves! They event couldn't use their Potions and single move!
Breloom uses Mach Punch- Lunatone's HP cut to less than half
Blastoise uses Surf- both Solrock and Lunatone fainted.
It is a joke? Or a glitch? They're just to easy. Note that each one Gym Leader before I needed a rematch to defeat them!