Pokmon TCG Pocket's friend system is appropriately basic for a series from the Nintendo school of online play: you add someone via their lengthy friend code and then can only interact with them either by viewing their profile and collection, having a private battle, or, from time to time, having five of their cards pop up in Wonder Picks
As far as I can tell you'll not often have multiple Armies on your side (though it is possible), even though - to me anyway - "Army" smells go-wide rather than go-tall
Even if you want to just tap it for mana your opponent will have to respect the fact that you could smack them and will have to play accordingly
Now, imagine you charge $24,000 in a year
Scan a Pokmon card, confirm the match, and see your whole collection by set, rarity, condition, and market price
SR Super Rare UR Ultra Rare SE Secret Rare UL Ultimate Rare PS Platinum Secret Rare CR COLLECTOR'S RARE QCSE Quarter Century Secret Rare Forbidden Lance X SPELL Quick-Play Target 1 face-up monster on the field