lemme tell you this
The ghost one was just because my favorite halloween movie at the time was Ghostbusters, but i decided to dress as the actual ghost (my sister, who was 1 at the time dressed as one too)
The Ash Ketchum one wasz me wearing a blur hoodie with some clothes, his hat, and just having a Pokeball in my pocket (my sister, who was 3 at the time dressed as Pikachu)
The Grim Reaper one was a Goodwill Ghostface robe with a hood
Marshmello was me wearing all white with a $9 amazon styrofoam mask
and the clown mask is just a 3 dollar Wal-Mart mask with a black hoodie i already own
the most effort i put was actually the PvZ Zombie, where my mom made a mask out of metal contailters, paint, clay, a traffic cone and lots of glue (my sister, who was 2 at the time, dressed up as a sunflower, because PvZ)
and 2020... you already know what happened that hear that we didn't celebrate halloween