Hi!
Friend Ball
2.5/5
It would be only useful if your opponent has the same type of Pokemon as yours (E.g Fire Deck VS Fire Deck). Then only can you pick a useful Pokemon from your own deck.
If not, it's quite useless. So it's 50%.
IPO Invention
2/5
Not as useful. E.g opponent has 1 super good Prize and 1 super lousy. To shuffle or not to shuffle? That is the question :D