The X Defense (Japanese: ディフェンダーDefender) is a type of battle item introduced in Generation I. It temporarily boosts the Defense stat. Prior to Generation VI, it was known as X Defend.
The X Defend appears as four Wonder Launcher items, increasing the Defense stat by 1, 2, 3 or 6 levels. It costs 3, 5, 7, or 11 points to use respectively.
In the spin-off games
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X Defense (along with X Attack and X Speed) appears in Super Smash Bros. for Nintendo 3DS/Wii U as equipment that any of the five playable Pokémon can use. X Defense raises the holder's Defense while lowering Speed. While it will occasionally come with a special effect, the ones without effects come in three rarities: normal, Threefold, and Sixfold.
After rescuing a distressed Mii in an area, he or she will occasionally use X Defenses (along with X Attacks, X Speeds, or potions). What they give out is chosen randomly upon being rescued. The X Defense boosts the Defense stat for some time.
The English language release of the X Defense uses the direct translation of its Japanese name Defender. Defender's first apparence was in the Trainer Deck A, before the Base Set's official release. This print has a red border and "Trainer Deck A" printed on the back.