What are some non-event, non-legendary pokemon that are stupidly rare?

>>32247699
Glameow was stuck in Pearl for quite some time.

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>>32247879
This.
Other than it, Spiritomb only became a regular encounter in ORAS.

>>32247699
most of the gen vii pokemon, particularly mareanie and dhelmise

>>32247699
Lapras, hard as fuck to find and capture. Especially when it always kills itself with Perish Song.

>>32247905
Spiritomb was a Friend Safari mon in XY

>>32247954
They like to show up in my Poke Pelago.

>>32247962
Literally everything was.