Look closely at each room to see where the Invizimals could be hiding. If you think you see one, aim the PSP at that area to reveal which Invizimal it is on the PSP screen. You need to capture a certain number of each type to complete the level. But aim carefully so you don't run out of battery. Capture several Invizimals in a row to increase your combo score with a chance of unlocking bonus rewards.