In the original, Marik puts an end to his dad in the most permanent, and fatal way
Many counterfeits are noticeably thinner (cheap paper stock) or thicker (low quality cardboard laminated poorly), and the difference is often obvious just by feel once you have handled a genuine card
2019 Pokemon Sun & Moon Team Up Full Art Latias & Latios GX #170 Price Range: $125 to $1,925 Highest Sale Price: $2,000 PSA 10 Supply: 908 Latias & Latios-GX are Legendary Pokmon with an ultra-rare and ultra-expensive Alternate Art version of the card
As the name implies, this is the first set to introduce Pokemon-ex cards, which gave those cards a huge increase in power
Having played with and against this card, its much more challenging to play with and against, since people can craft piles with cards like Eternal Witness, Snapcaster Mage, Ravens Crime, or Life from the Loam to basically guarantee access to what they want