when you say "pulsar", i presume you mean the gti-r? the pulsar was available in 1.4, 1.6 etc aswell. also, the gti-r brakes are the same as the n14 sunny gti and n15 almera gti, possibly more.
the 100nx was available in europe with the sr20 engine i think. so that'd come with gti-r brakes as standard.
yes they will bolt straight on. the 100nx is just a sunny coupe basically. you wont even need the 1mm spacer washers like the k11 needs.