Seth: Again, you are missing the point that Hydreigon wouldn't give two fucks about Pursuit even if he were neutral. The reason Lati@s are so scared is because they are NOT very bulky physically without investment and they are weak to Dark-type attacks.
It doesn't matter that it doesn't compound any weaknesses or compromise any resistances; being weak to Fighting is that damning. Are you telling me that Hydreigon, who would otherwise completely annihilate Breloom and be far less vulnerable to every Fighting-type ever, is NOT held back by his sub-typing? The coverage gained by STAB Dark Pulse is limited to SpDef Jellicent*, but THAT'S compromised thanks to Justified Terrakion.
*: Dragon Pulse/Draco Meteor is breaking everything else that Dark Pulse would cover in half, including 252/0 Reuniclus, who is 2HKOd by 252+ LO Dragon Pulse.
FaceFaceFace: "Genesect is like the Terminator. Scary when he's coming after you, absolutely lovely with ridiculous punch-lines when he's on your side."