Yes, it is Pikachu's only evolution, though Pikachu has a pre-evolution, Pichu.
find a thunderstone and use it on pikachu then your pikachu will evolve into the powerful max evolution raichu
Raichu
Pichu -> Pikachu -> Raichu (It's called evolution)
Currently, Pikachu does not have a Mega Evolution form or haven't announced a Mega Evolution. Relating to Mega Evolution, Raichu, however, will have a Alola Form, exclusive to the upcoming Pokemon Sun and Moon.
Pikachu ONLY evolves into a Raichu when you give it a Thunderstone.
A Pikachu evolves from a Pichu.
The Light Ball won't work on a Raichu, since it only doubles the Sp. Atk of a Pikachu.
Raichu is the evolved form of Pikachu. To get a Raichu, use a Thunder Stone on a Pikachu.
In Pokémon HeartGold, you can get a Pichu by breeding a male Pikachu or Raichu with a Ditto, additionally you can use a female Pikachu or Raichu and breed her with a male Pikachu or Raichu, a Ditto or with someone in the Field Egg group such as Rattata, Sandslash and its pre-evolution of Sandshrew, Mankey and its evolution of Primeape, Arcanine and its pre-evoluton of Growlithe, Vulpix and Ninetales.
Pichu only has one form. If you're evolving it, then there are three. Pichu, Pikachu, and Raichu. Pichu to Pikachu is by happiness and to get Raichu you have to use a thunderstone on Pikachu.
No, Raichu won't be Pikachu-colored if you evolve your Pikachu-colored Pichu into a Raichu, it'll look like a regular Shiny Raichu.
I don't get what you mean... But if you when what does Raichu evolve into the answer is: He doesn't evolve Raichi is the final evolution of Pichu... It goes Pichu > Pikachu > Raichu If that wasn't what you meant... sorry...