That was my thought too. XD Hm... But still, we need something big... I know. Get all of the ghosts and pokemon with psychic powers together, and have all of them move the ferry from the dock to the middle of the island. XD Like in the beginning of Pokemon XD Gale of Darkness. XD How about that?
XD Nah, I don't see that happening at all. But the other ghosts... Hm... We need to think of more pranks. That one won't last very long as far as laughing goes... Hm... How about if Leena gets ahold of the PA system and directs everyone to go see what she and Snype did? But that would likely end up leading to Bri, as he's the only one I am aware of with a talking Misdreavus. XD
Hm... I got an idea for a prank they could do. :D During the night, Leena could steal a piece of clothing from Gary Oak, and then Snype, because he has hands, could hang it from the flagpole. XD It's kind of stupid, but that's what makes it funny. :D And I think you know which article of clothing she'd steal. :O