That said, forcing some bad combat choices with first strike is also possible, so while Im not high on the card, its not a bad card by any means
With the -2 however you generally get a pretty solid 4+ mana worth back
While TCG Online players won't be able to use their custom decks in the Trainer Challenge mode, the workaround is using them in the test mode
TAHK0 speculated on why the error may have happened, writing, Poke Balls went through a lot of early variations, with everything from the button placement changing, to how it opens differing, to even being depicted with the white on top. It could be that an early Pok Ball design actually did open like it does on the card back, but when the design was eventually changed to the opposite way, they forgot to update it on the card back before going to print, and it remains that way to this day
One attack lets the player clear the field and get a powerful beatstick with a clear path to their opponent's Life Points