Basically, if you look up a Dedenne and a Raichu and put them right next to each other, Raichu looks a lot like a Dedenne with fur color and that they are both a electric types. So hope this helps your Raichu vs. Dedenne problem!
Although Dedenne looks like Pikachu, this Electric/Fairy-type Pokémon does not evolve.
Dedenne is #702 in the national pokedex, and it is an Electric-Fairy type Pokemon.
Raichu does not evolve. Raichu is the combination of Pickachu and a thunder stone, and he does not evolve.
Raichu is the evolved form of Pikachu. To get a Raichu, use a Thunder Stone on a Pikachu.
Raichu was created in 1996.
Raichu is the last form of pikachu and its preevolution is pichu.
On Overgrown Paths was created in 1949.
Overgrown Eden was created in 2002.
Raichu never evolves. Unless you meant Pikachu, which evolves into Raichu. Or Pichu, who isn't in Leafgreen but evolves into Pikachu, then Raichu.
Raichu currently cannot evolve.
Raichu is better.
raichu is 2'7 feet tall