Fire into a fish

From Glitches

From the game Super Mario Bros. Deluxe for the Nintendo Gamecube

In one of the castles, jump on a koopa near the end of the level where fire is spit out across the level. Kick the shell into one of Bowser's flames and the flame will turn into a fish and die. You will be rewarded 100 points.

Submitted by: PROBLEM2