Authentic Rainbow Holo cards have detailed surface texture, proper rainbow holo effects, and clean printing alignment, while fake cards often miss the texture, use incorrect foil effects, or show inconsistent fonts and colors
Stop wasting time searching empty shelves
Both of these will help you to spot shadowless cards for Pokmon, but for Trainer cards - which don't have a drop shadow in any printing, and never have an HP value - you need to check the Copyright information
When this set released, this was the ultimate chase card and everyone wanted to pull it
All creature cards, surebut opening a Phage the Untouchable will lose you the game
Once that ability resolves, it doesn't matter whether Innocuous Researcher stays on the battlefield