The number of species having a square planar shape from the following is
${\mathrm{XeF}}_4,{\mathrm{SF}}_4,{\mathrm{SiF}}_4,{\mathrm{BF}}_4^{-},{\mathrm{BrF}}_4^{-},{\left[\mathrm{Cu}{\left({\mathrm{NH}}_3\right)}_4\right]}^{+2},{\left[{\mathrm{FeCl}}_4\right]}^{-2},{\left[{\mathrm{PtCl}}_4\right]}^{2-}$

XeF₄ → square planar
SF₄ → sea-saw shape
SiF₄ → Tetrahedral
${\mathrm{BF}}_4^{-}$→ Tetrahedral
${\mathrm{BrF}}_4^{-}$→ square planar
${\left[\mathrm{Cu}{\left({\mathrm{NH}}_3\right)}_4\right]}^{+2}$ → square planar
${\left[{\mathrm{FeCl}}_4\right]}^{-2}$→ tetrahedral, ${\left[{\mathrm{PtCl}}_4\right]}^{-2}$ square planar