Potential Quick Move: Bite
Potential Charge Move: Stone Edge
No surprise here. With a 251 attack stat and stab on bite (bite being identical to Water Gun except Dark-type), Tyranitar will hit harder then Vaporeon in all neutral match ups (5 to 6 damage per hit) and tie with it when Vaporeon has the super effective advantage. For a small reduction in attack to gain a considerable amount of HP, Tyranitar is the new Dragonite. Although, his weakness to Water, Ground, and Fight could hold him back a little against common gym defenders Vaporeon and Rhydon. But! Tyranitar does resist the ever present Psychic-damage many common gym defenders use, particularly Zen Headbutt.
Potential Quick Move: Mud Shot
Potential Charge Move: Earthquake
Donphan is a slight variation on Vaporeon, the only difference between Mud Slap and Water Gun being type and an extra 0.05 delay. It trades HP for higher defense, which in certain match-ups means dodging results in 1 damage when Vaporeon would take 2. It also means slightly less damage when tanking hits, like when using a charge move. Without dodging at all, Vaporeon will still slightly outpace Donphan, but in most continuous dodging scenarios, the two will pump out about the same damage.
Unfortunately, Donphan’s match-ups are a little worse than Vaporeon’s because of its weakness to water and ice (while Vaporeon resists). It can make up for it by not being resisted itself, however, because finishing the fight sooner is the best kind of damage reduction you can get.
Potential Quick Move: Bug Bite
Potential Charge Move: Megahorn, Cross Chop, Brick Break
Bug Bite is currently one of the highest potential DPS moves in the game and the highest for energy per second. The 0.45 duration often allows for 1 extra hit against slow moves, like confusion, compared to Water Gun. Despite being 1 damage less then water gun, Heracross’ high attack (234) should keep the damage competitive. Even in high defense match-ups where Bug Bite may suffer, the faster energy generation should make up for it.
Megahorn will be the best damage per energy. Cross Chop and Brick Break are both excellent moves because of their very fast duration, allow Heracross to use them without missing a dodge. This is important since its HP is average.
Why no fighting quick moves? Rock Smash doesn’t allow dodging, and Heracross doesn’t have the bulk to tank. Karate Chop and Low Kick are seriously underpowered right now. Even with Stab + Super effective they barely match Water Gun’s damage but with much worse energy gain.