So if im not running rapid spin then i will not go with 6 perfect IVs. Thanks for this. Really helpful as I am just trying to enter competitive community. Now, Im having a problem who will I go with this Blastoise. I need to pick 5 more.
I would strongly recommend going with rapid spin, because that is pretty much the only reason it is worth using mega blastoise. A good set for him is:
Blastoise @ Blastoisenite
Modest
252 HP / 252 SpA / 4 SpD
Rapid Spin
Water Pulse / Scald / Hydro Pump
Dark Pulse
Aura Sphere / Ice Beam
This set prevents pretty much makes it a given that blastoise will get off a rapid spin to remove your opponent's entry hazards, because almost no spin blocker would dare to switch in fearing a dark pulse to the face.
Good teammates to mega blastoise are those who need entry hazards to be removed to be most effective. Gale Wings Talonflame, Multi scale dragonite, and volcarona are a few good teammates. So is aegislash, because blastoise can deal with some of the ground and fire pokemon that aegislash has a problem with. He's also pretty good against sticky web, because he can easily remove the opponent's sticky web while keeping your own hazards