From Kirbypedia

English Name:	Love-Love Stick
Japanese Name:	ラブラブステッキ Rabu-Rabu Sutekki Love-Love Stick
Game:	Kirby's Dream Land 3
Boss Used Against:	Dark Matter, 0
Anime Episode(s)	None

A legendary item that Kirby's wields to battle Dark Matter and 0. Also considered a copy ability, though he doesn't need to inhale it to gain its power. It is a red and yellow striped wand that begins at a point and ends at a flat surface topped with a golden heart. It is also known by fans as the Heart Rod.

Games

The item only appears in Kirby's KiraKira Kids and Kirby's Dream Land 3 where it must be obtained in order to defeat the final boss, Dark Matter. It is unlocked by collecting each of the thirty Heart Stars from every stage in the game. Various friends and allies will reward Kirby with one at the end of a stage if he completes some task during the level. This ranges from finding items, solving mini-games, or bringing by an Animal Friend for a visit.

The Love-Love Stick is only used by Kirby in the last level, the Hyper Zone. It is used to battle three different incarnations of the final boss. When it is swung, a heart-shaped shot is thrown out. These are used to attack the enemy. There is no limit to the use of these attacks, just as with the Star Rod and other end-game abilities.

Gooey does not wield the power of the wand directly. Instead, he is transformed into a miniature version of Dark Matter with his same face. In this state, he can spit out an infinite amount of stars.

In KiraKira Kids, Kirby uses the Love-Love Stick to whack his opponent when he gets large chains cleared.

Kirby Copy Abilities:

Cupid - Animal - Backdrop - Ball - Balloon - Baton Twirling - Beam - Bomb - Bubble - Burning - Clean - Cook - Copy - Crash - Cutter - Fighter - Fire - Freeze - Galaxia - Ghost - Hammer - Hi-Jump - Ice - Iron - Jet - Laser - Light - Magic - Metal - Mike - Minimum - Missile - Mirror - Needle - Ninja - Paint - Parasol - Plasma - Sleep - Smash - Smash Bros. Abilities - Spark - Stone - Suplex - Sword - Throw - Top - Tornado - UFO - Water - Wheel - Wing - Yo-yo

Final Weapons:

Star Rod - Love-Love Stick - Rainbow Sword - Star Chariot - Master - Triple Star - Block