to make wishes you need to activate ctdb mode (capture the dragon balls) you do this by activating it in advanced in the "new server" thing but unfortunately the maps that come with esf only have one that supports ctdb and thats riverside but it has a bug where one of the dragonballs spawn under ground so you have to go download a few custom maps that have ctdb support *gasp*
then when you manage to do all that you just find all the dragonballs with your radar (they show as yellow squares on your scouter in-game) put them close together, and when they glow hit the "B" button on them and youll get three choices
first choice is:invulnerability for a set ammount of time
second: +1 million power
third: doesnt do anything but add up the capture score
hope that helped