This is the latest method I use to make my own holographic Pokemon cards. I like to make custom cards for special occasions or for building a deck for proxy play.

Transparent Holographic sheets
https://amzn.to/3pOf4DY
https://amzn.to/3EQyTip

Corner Rounder
https://amzn.to/3pPCyc1
https://amzn.to/3pQup7h

Paper Cutter
https://amzn.to/3JAMMVr
https://amzn.to/3mTXSen
https://amzn.to/3FRq74R

Premium Paper
https://amzn.to/3JC9MU0

Inkscape
https://inkscape.org/

Inkscape SVG card templates front/back
bit.ly/32MTK9h