This can lead to some seriously high attack stats, but this will also leave you incredibly frail
After Yusei defeats Antinomy, she, along with Jack and Leo, reunites with Yusei and, inside the Support Gear, finds Z-one
So if you really want to know what promos are Pauper legal, you have to find a list of all common Magic Online promos then MANUALLY LOOK UP EACH CARD to see if it has other online printings (in which case it isn't legal), unless one of those other printings is at Common (in which case it is legal)
But this is a fantastic way of getting more monsters on your field to summon with, be it tribute, link, synchro, or whatever type of summon you feel like
The overall disguise is shaped like a Pokmon called Pikachu [9] and is a meta-referential element of the Pokmon franchise