make a checklist of things that stop pinsir
>physical walls
skarm especially, get something that can remove him immediately and doesnt just scare him out because he hard walls pinsir even at +2
>rocks
have at least one spinner/defogger and keep them fucking alive
>priority
have something that counters scizor and talonflame, they will set up or one-shot you
>things that outspeed base 105 and can survive qa
get something that can remove passed speed or dragon dancers like gyarados, dragonite and zard x
twave support is a plus, otherwise just watch the legendaries; terrakion, raikou, etc can outspeed and kill you
>anything that can tank a +2 return and ohko in return
tyranitar is easy to handle with cc but it also makes you vulnerable to priority so be careful in dispatching him; you might want to have another answer to him that isnt pinsir
the same goes for azumarill to a lesser extent
>status
do not let pinsir get par/burned
have things that can absorb these
now make a small pool of things that fill those niches
things like heatran, magnezone, rotom w/h, conk, exca, ferro, latias, scizor, etc
generally youre gonna want things that can take strong ice, rock, electric and fire attacks and remove them from play
teambuilding is not hard, use brain