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Giant Bananas are larger variants of regular Bananas that occasionally appear as items.
Mario Kart: Double Dash!!
In Mario Kart: Double Dash!!, it is a special item that Donkey Kong and Diddy Kong, (and Petey Piranha and King Boo, due to their ability to have any special item) can obtain in Double Dash. Once a driver makes contact with the Giant Banana Peel, it not only makes the driver spin out for a longer duration for a regular Banana, but it also leaves behind three regular Bananas on the ground. The Giant Banana is resistant to most items, but it can be destroyed with a Bob-omb, Chain Chomp, Yoshi Egg and Bowser Shell, though the Bowser Shell will get deflected. It can also be picked up by running into it while using the Heart.
Mario Strikers Charged
In Mario Strikers Charged, the Giant Banana is one of the many items used by the players. Whoever uses the item drops it behind them, which hits anyone who runs into it. It is similar to the smaller Banana, though the Giant Banana has a larger range and can hit more than one player. Unlike the smaller bananas, the Giant Banana item only deploys one banana, not multiple bananas.