Have with u something hot as heck,the dress like fox and then come like:FIREE!,While you burn people
Dress like the killager,and kill them with an axe,and then go with a watering can and water their cadaver

Dress as Ness/Lucas and hit people with a baseball bat
Dress as Ike/Link/Marth/Lucina/Roy and hit people with a sword (works better with link)
Dress a King Dedede and hit people with a hammer
(Only applies for muscular people or good at IRL fighting)Dress as Little mac/Captain Falcon/Ryu and punch them until they blood

(Can try with other Street fighter characters)
Dress a DK/Diddy Kong and throw bananas to people (Works better with a crushed banana)
Apply the Link topic...With a kid to make it the Toon Link version (works if is a short kid)
Dress as Jigglypuff and sing to other people,then knock them/make her or him asleep with chloroform and then write in their head with permanent marker,the most perverse and gross things you can imagine