Along with Quick Ball and Dusk Ball, Poke-Radar is a Trainer worth considering if you're trying to run a deck that utilizes the unusual Trainer engine to get you Pokemon.
Unlike Dusk Ball and Quick Ball, though, you can potentially get more than 1 Pokemon. If you have 30 or so Pokemon, there's some chance (1 or 2 in the top 5 cards) that you can get a Pokemon. That's the catch: You need to run many Pokemon in your deck to make the best use out of this card. Of course, there is still the chance that you won't get anything after using Poke-Radar (unlike Quick Ball which can almost always guarantee a Pokemon), and unlike Dusk Ball, there is cards to choose from (5 cards compared to Dusk Ball's 7). Unfortunately, there's no card to arrange your top 10 cards... And even then, it would be quite overpowered.
Modified- 5/10 (can net you more cards, but very chance-reliant. If you have the space to fill your deck with a lot of Pokemon, why don't you just use search and draw supporters and trainers instead to fill up the deck space?)
Limited- 7.5/10 (more chance to get Pokemon here as drafts usually contain only Pokemon and energy. Be sure to have a lot of Pokemon if you want to run this)