Wisp

Wisp is a spirit that appears in the Animal Crossing series at night (usually between 11 p.m. to 4 a.m). The Player must talk to him (Animal Crossing), catch him and five other spirits (Wild World) or find his lamp (City Folk). He will reward you with either the removal of weeds, a new roof color or an item of furniture. However, in City Folk, roof paint can be bought from all of Toom Nook's Stores, so a new option was introduced, Smash roaches, which removes all the cockroaches in the Player's house.

Hints and Tips
FAKE
 * Unless the player has not weeded for two weeks it's better to pull out all weeds by hand.
 * Unless the player has not upgraded to Nookingtons he/she can always buy a can of paint from Tom Nook. If the player hasn't upgraded, the player can pay off all of their debt & change his or her roof color. Otherwise, this is the best option.
 * The items he gives out are not generally rare and may already be available to buy in the catalog.
 * Some of the items he does give out may not be in the catalog, so this option may make the item available in the catalog to buy.
 * Cockroaches only appear if the Player has not played the game for a while. So unless there is a roach infestation, this option isn't very useful.