Physics at forward and backward rapidity in hadron+hadron and
nucleus+nucleus collisions give access to kinematic regions that
give unique information about nuclear effects from cold nuclear
matter, crucial in understanding signals from the final state, such
as the Quark Gluon Plasma. This proceedings will focus on three
areas of interest. The first will describe a
measurement of J/$\psi$ suppression in U+U collisions (measured by
PHENIX in the forward and backward regions) where signs of
regeneration from $c\overline{c}$ coalescence are seen. The second
will include a measurement and discussion of the effects causing
suppression of the $\psi$(2s) to $\psi$(1s) in cold nuclear matter.
Lastly, I will provide an analysis update data taken with a recently added detector to the PHENIX
experiment, the MPC-EX that has as its purpose, the measurement of $π^0$s and direct photons in
cold nuclear matter at low-x.