Krusty's Fun House Cheats - GameBoy
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Easy rat trapping
This may be done in any room where Krusty has at least
two moveable blocks. Position the first block near a wall. Wait
until the rats have crossed and are between the wall and the block.
While standing on top of the first block, release the block that
Krusty is carrying and trap the rats. If the area where the rats
are trapped is only as wide as one block, all the rats in that
space will be compressed into a single rat. This is especially
useful in areas where Krusty must build stairs for the rats to
climb in order to reach the trap.