Bob-omb

History:

The Bob-ombs are an Ancient Race that has inhabited the heart of the Mushroom Kingdom for centuries. Eons ago a Dark Lord sought to create a race of sentient living weapons and so placed his Dark Power into hundreds of his bombs to use against his enemies. They were to be the perfect weapon - a walking, thinking, chasing explosion on legs. They eventually broke free of the Lord's control, though, and settled far away in the Mushroom Kingdom. Eventually though, Bowser gained their Allegiance through his puppet, the Big Bob-omb. Since then, the populace has fractured and battled, with the Pink Bob-omb Buddies continually at strife with the Black Followers of Big Bob-omb. Their Kingdom has turned into a Battlefield, and remains the closest intrusion of Bowser's Dark Influence within the Mushroom Kingdom.

Bob-ombs appear in:

Double Dash
DS
Wii
7

Bob-ombs began as the Special Item for Wario and Waluigi in Double Dash. Their use was equally sinister and retarded enough to suit the Stupid Evil of those two goons. In every game since then, though, Bob-ombs have returned as Items available for everyone's use. And that use is always deadly.

Bob-ombs are extremely volatile. They'll pop with the slightest touch of just about anything. They may be placed behind or thrown forward and thus their use is similar to Bananas or Fake Item Boxes. While those items will either hit players and disappear or remain idle and small on the track, Bob-ombs are far more deadly. They will erupt in an explosion similar to a Blue Shell if struck, or just on their own after a few seconds. The thing is, those seconds tend to be exactly how long it takes to catch up them when thrown forward. Therefore, unless you've got a great clear shot at hitting someone immediately when going forward, I would always toss it behind. The huge size blast radius is extremely difficult to avoid, especially in Double Dash where only the Heavy-Kart Wario or Medium-Kart Waluigi can wield the Item.

They are also dangerous to drop behind, though. If you drop it directly on someone sneaking up from behind or it gets hit with a Shell or something, you're donezo. It's not a bad strategy to try to peg a Bob-omb if you see someone ahead of you drop it and you're lucky enough to be equipped with something that can ignite it. Otherwise, that's not good news for you coming up behind. These things are generally a disaster in every way. They're only good in DS where they may be stolen by someone with a nearby Boo.

Fake Item Box

History:

Races underwent many changes during the Second Grand Prix. For the first time, Item Boxes were created rather than panels. During the first wave of their production though, many proved faulty. Instead of giving an item, they would explode and crash the racer. Soon after the technique for Item Box creation was perfected though, competing companies made knockoffs that were still faulty and sold them to individual courses, much to the danger of competing racers. Eventually the Grand Prix Governing Body reconciled the safety of racers with the concerns of the many new and growing factories that had sprung up to support the Races. The faulty Item Boxes were slapped with an inverse Question Mark and progressively labelled "Fake." They would, however, be accessible by true Item Boxes and used by drivers during the course of a race.

The Fake Item Box appears in:

64
Double Dash
DS
Wii
7

There have been some variations of the Fake Item Box throughout the years, but the purpose has always generally been the same. It is another, more deceptive means than Bananas for Lead Drivers to knock around those racing behind them. Indeed in 64 while running over a Banana was salvageable, Fake Item Boxes meant certain doom. 64 was also the game where the boxes where most similar to genuine Item Boxes, the only difference being the position of the Question Mark. In later games the boxes were red, or as in DS, lack a Question Mark at all. These make the boxes a tad easier to avoid.

Another major progression of the Fake Item Boxes throughout the history of Mario Kart is their physical properties. In 64 they acted very similar to Bananas - they could be dragged behind a Kart in order to prevent a Shell from crashing into the back. They could also be destroyed by shells moments before running into them. Their only real difference from Bananas is again, its greater deception, larger size, and an inability to throw them forward.

Most of this changed in Double Dash. Shells and other character-specific projectiles such as Fireballs and Chain Chomps would now pass through Fake Item Boxes, both when dragged behind a Kart or laid on a track. When Karts are hit while dragging, the Item is not lost, though. The Fake Item Box can be launched forward, however, making it an offensive weapon as well, as tricky as it is to peg a moving Kart from far away.

There are many strategies to both using Fake Item Boxes and avoiding them. Careful racers who can memorize True Item Box locations on courses will not be deceived, even in 64. Still, they can be used effectively to block ramps or shortcuts, or at least narrow track sections where running into one is inevitable. Another good drop spot is in a cluster of True Item Boxes, possibly sitting directly on top of a True One, even though timing this can be difficult. Still, limiting the amount of Item Boxes accessible to the competition is a good thing. Their offensive use can still work in rare circumstances, although it's rare that they will appear in positions deep in the pack. If there is a situation where you receive a Fake Item Box and are then passed, it's best to try to chuck it into a crowd, or a particularly deadly maneuver is to launch it into a True Item Box cluster that another racer is about to pass through. It's tough to react to things falling out of the sky, and the CPU will rarely be able to anyway.

Boo

History:

Throughout the Course of Time there have been many deaths in the Mushroom World. When both Koopas and the Mushroom People fall victim to an unnatural death their souls may be unable to move on. This causes them to anchor to the World of the Living as ethereal Ghosts named Boos. They eventually forget their past lives and exist only to terrorize the living, from some instinctual urge to spread as the fear of moving on that has consumed them. As such they serve no living master and flit in and out of the races as they please. Their Commander, King Boo has taken part in the Grand Prix and many courses have been constructed over their lands. At times they have also found their way into Item Boxes, where their mischief leaks onto the races themselves. Their presence is not sanctioned by any Governing Body of the Grand Prix and they are not welcome, although they tend to be helpful to racers.

Boos appear in:

64
Super Circuit
DS

The Boo notably only appears in games similar to the 64 mold - games with a limited number of core characters but slightly advanced in course selection. It does appear in SMK, but only in multiplayer modes. Once activated, the Boo causes a few things to happen. Offensively it causes the racer and his or her Kart to turn incorporeal, allowing him or her to pass through garbage like Bananas and Shells strewn across the track, as well as to pass through other drivers. While this is happening the racer also vanishes from the course map and the screen of opponents, allowing for some very sneaky play.

In Super Circuit, the Boo also slows down the lead racer and causes him or her to lose coins. This feature vanishes from DS, but it also negates the slowdown caused by Offroad travel, allowing drivers to snip some shortcuts or at least not be hampered by mistakes or sloppy driving.

The other ability that Boos bestow is the theft of another item. Once activated, the Boo will travel to another nearby racer and steal his or her item and then bring it back to the activating racer. This is a handy defensive measure in that it takes away another driver's advantage and gives it to you. There's no telling what this Item may be though, and no real strategy to select it. Still, a free Item is always helpful. If no one around you has an Item, then this function is not activated.