GHOST was hiding by Finn, who was oblivious to the whole thing.

Mizu eventually found GHOST hiding in a broom closet, GHOST flew past Mizu, and bubbles and kept flying away

Bubbles, who was wearing all black and shades (XD) followed Mizu.

"Precious! Wait uuuup!" Mizu called to GHOST with a box of kitty food

Bubbles facepalmed and followed.

"MIZU!" Finn called.
"Durp." Mizu answered.
"Ghosts don't eat cat food." Finn replied with a -.-' face.
"OH BUT THIS IS KITTEN FOOD!" Mizu yelled, chasing GHOST.

Gem slammed her head on her desk.

GHOST surprisingly didn't use CURSE yet (Not "Curse" "CURSE", "Curse" Lowers speed if not Ghost type, and basically kills the Ghost type if it is, "CURSE" on the other hand sends trainers and Pokemon straight to hell, leaving only a tombstone) GHOST cut the lights, giving him an edge over Mizu, and hid again

(0.0)
"BUT GHOST!!!! WHERE ARE YOU!" Mzu cried.

Gem stood up and left the classroom.

GHOST still hid

Mizu went on a rampage because he couldn't find GHOST. There were pumpkin pies all over! Oh yeah, and then there's the pile of broken furniture in the corner, but MOSTLY the pumpkin pies.

Gem went home, even though it was against the rules, considering it was the middle of the school day.
"I've had enough..." She muttered.

Finn left school to go to Gem's house.
"HEY GEM!" he smirked when she opened the door.

Gem really wanted to slam the door in his face, but managed to just stare at him blankly.