As Mega Raichu X, it takes on a color scheme reminiscent of Pikachu with its red cheeks and bright yellow fur, but its overall appearance retains a distinctive resemblance to regular Raichu. Its original brown eyes have become red. Its tail has split into two identical tails, which are similar in shape to Pikachu's tail, except for the zig-zagging black fur coloration at the base of each tail. Both of its arms and ears are much larger. The yellow insides of its ears are gone, and its ears now sport a solid black color with golden tips. It also now has two prominent fang-like canine teeth, though artwork often depicts it with its left or right tooth exposed when its mouth is open. When using electricity, its cheeks and its tails glow brightly. Mega Raichu X's two tails can generate an electromagnetic force to create enough repulsion for it to float and swiftly propel itself in the air. It focuses its electric power into its fists as its primary method of attack, allowing it to take down much larger opponents in one strike. It has ample subcutaneous fat which stores up electricity, augmenting its defenses and allowing it to maintain a high electrical output for long periods of time. Its ears and forked tail produce 50 million volts of electricity as it flies, and its appearance while levitating resembles the letter "X". In HZ138, it is shown to be able to move as fast as a bolt of lightning.
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