The actual point is to have the Token on your field, so you can enable your other effects
It will trigger even if its controller is the one that discarded a card this turn
Doing so lets you search your library for a Dragon creature card and put it directly onto the battlefield, which is a ridiculously powerful ability given all the wild Dragon cards Magic has printed over the years
Exiling is possible via cards like Chrome Mox, delving it, or hating it via Faerie Macabre
this sometimes shows a Skull, but can also be a kind of gloopy, liquid illustration, depending on which type of Pokmon token players have to hand
A PSA 10 of a bulk card might jump 20x in value, while an incredibly common SIR might only jump 2x