Pikachu would probably be very curious. It might zap the lightsaber a bit to see what would happen, and then be in awe of the bright blade. It could also get a bit protective of Ash when he wields the lightsaber, as if it senses the added danger.
Well, if the council made Anakin a master, it might have given him the validation he craved. This could have led to a different path for him, with less anger and frustration building up inside.
Naruto's fighting style would likely incorporate more acrobatic flips and spins to take advantage of the lightsaber's reach. He'd also use his shadow clone jutsu in new ways, like having clones surround an enemy while he attacks from above with the lightsaber.
If Anakin hadn't turned, the Sith's plans might have been foiled. The balance of power would have remained with the Jedi, and galactic conflicts could have been avoided or resolved differently.
Well, the galaxy would have been a much more peaceful place. The Jedi Order might have remained strong, and there would likely have been no rise of the Empire.
If Anakin never turned to the dark side in comics, the Jedi Order could have remained strong and continued to maintain balance. Maybe he would have become a great Jedi Master and trained many new padawans.
Anakin not going to the dark side could have prevented many conflicts. Maybe he would have found a way to peacefully resolve issues instead of resorting to violence. It would have changed the course of the entire Star Wars universe for the better.
His lightsaber might have a blade that is constantly changing in shape and intensity, just like his unpredictable ninja skills. The hilt could be made from a special metal found in his world, perhaps with a chakra - infused gem at the center. The color of the blade could be blue, representing his loyalty and trustworthiness, and it could also emit a faint glow that corresponds to his own chakra signature.
In the fanfic, Naruto's lightsaber could be a large and imposing weapon. The hilt could be long, allowing for a two - handed grip, which would suit Naruto's combat style. The blade could be a bright green color, symbolizing his growth and connection to nature in some ways. There could also be carvings on the hilt that represent his friends and family, as they are very important to him. And the lightsaber might have a special ability, like being able to split into two smaller blades for more complex combat maneuvers.