Complete Item List for Mario Kart Wii: Offensive, Defensive, and Special

Mario Kart Wii features 24 obtainable items (plus a few unused). Here's the full breakdown by function.

Green Shell: Fires straight. Bounces off walls. Hits anyone.
Red Shell: Homing. Targets nearest racer ahead. Single hit.
Triple Green Shells / Triple Red Shells: Three orbiting. Fire one at a time.
Blue Shell (Spiny Shell): Targets 1st place. Explodes on impact (AoE). Can be dodged with Mushroom/Star/Boo at exact frame.
Banana / Triple Bananas: Deployed behind. Causes spin-out. Triples orbit.
Bob-omb: Thrown forward. Timer → large explosion. Can be held (risky).
Fake Item Box: Looks like item box. Explodes on contact.
Lightning Bolt: Shrinks all other racers (speed down, items drop, crushable). User unaffected.
POW Block (Wii exclusive): Shakes screen; spins out grounded racers. Appears in sets of 3.

Mushroom: Single speed burst.
Triple Mushroom: Three bursts in succession.
Golden Mushroom: Unlimited bursts for ~8 seconds. Rare (usually 10th+ place).
Star (Starman): Invincibility + max speed + off-road immunity + knockback others. ~7 sec.
Bullet Bill: Auto-drives at high speed through track (steerable). Targets 1st place path. ~10 sec.

Blooper: Inks screens of racers ahead. Obscures vision. Wipers clear slowly.
Boo: Steals a random item from a racer ahead (or nearest). User becomes invisible/intangible briefly.
Mega Mushroom: Giant size. Crushes opponents, flattens track. Wii exclusive.

Coin: +1 coin (max 10). Each coin = tiny permanent speed boost (cap 10). Lost on hit (3 coins).

Lucky 7 (Lucky Seven): 7-item roulette (Mushroom, Star, Red Shell, Green Shell, Banana, Bob-omb, Blooper). Cycles rapidly. Press item button to lock. Unused in normal gameplay; appears in CTGP-R mod.
Super Horn: Not in Wii (debuts in Mario Kart 8).

Position-based probability (1st gets Coin/Banana; 12th gets Bullet Bill/Golden Mushroom/Star). Weighted by distance from leader.

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