You won't find many moderately played (MP) or heavily played (HP) copies, so your options are limited
You can use it to save a heavily damaged Pokmon from being knocked out, preserve valuable Energy attachments, remove negative status conditions, or reset Pokmon with powerful "when played from hand" effects
We first played with a Red/White deck, which was described as an Equipment-focused deck, and then a Blue/Black more Assassin-based deck
Flair looks great when displaying cards in Pokmon TCG Pocket, and it gives your favorite cards a bit of a pop during battles
The good news is that a really funny uncommon can be worth more than most of the rares in the set, as we see with Cheatyface, one of the most iconic cards from Unhinged