Limited Edition: Only 450 additional packs available
There is a sales limit of 5 packs per person
Increase your chance of collecting all the 5 variations of the Metal Unit trading cards by purchasing a 3 card booster Pack.
There are also shiny cards hidden in packs. These appear in 1 out of 6 packs. The only cards which appear as shiny variants are the 5th, full image card.