Didn't we just have a huge debate in
Rankurusu's thread about why Quagsire
is not a terrible Pokemon?
Code:
252 Hp/ 252 Def Unaware Quagsire
252 Atk Adamant Balloon Doryuuzu Earthquake (100 Base Power): (37.6% - 44.4%)
252 Atk Adamant Life Orb Doryuuzu Earthquake (100 Base Power): (49% - 57.9%)
252 Atk Jolly Balloon Doryuuzu Earthquake (100 Base Power): (34.3% - 40.4%)
252 Atk Jolly Life Orb Doryuuzu Earthquake (100 Base Power): (44.2% - 52%)
Until Gastrodon can come in on Pokemon like Doryuuzu and take hits (as well as be able to Recover off nearly all the damage against almost all variants of them), and force a switch with Encore, or have the ability Unaware (and cripple them by changing the weather ontop of ignoring boosts), Quagsire and Gastrodon cannot really be compared because they will serve different functions when being used.
However, I will concede, that Quagsire and Gastrodon are
very, very similar. So much so that I didn't realize it until just a moment ago. The biggest difference between them being Haze, Encore, and Unaware (outside of, you know, stats and abilities). Aside from Unaware, Gastrodon is probably going to be the better Pokemon, and should probably always be used over Quagsire unless you need an Unaware + Encore/Haze Pokemon.