Ahem. I've played the cellgames daytime map and all of the dragonballs were there. You have to collect them all (you can only have one in your ... inventory and one in your hand at all times) and once you've collected them, you must press the use key to activate them. Several things need stating:
1.) You have to throw them all reasonably close to one another, when you have them all close, they begin to pulse yellow and then you can utilize them.
2.) When you equip your scouter, they will show up as orange balls, so head towards those. They -are- very small in respect to the entirety of the level, so search hard for them. If you still cannot find them, they probably don't work on that map. (Try the cell_day map... I've collected all of them, as mentioned earlier.)
That's about it... I won't spoil the wishes for you. Have fun.