How could you people pichu is awesome not only is it yellow it also comes in bite size, normal size, and GIGA SIZE! also there are 4 different kinds. in heart gold there is an orange event one that is as strong as a pikachu! there is also the spiky eared one in heart gold... weak. There is also normal one, and finaly there is a shiny non-event one.
Pikachu is awesome. Look at my avatar! Nuf ced... but I'll say more.
Whether you want to believe it or not, PIKACHU is the face of the franchise. It is always the constant factor in everything pokemon. Do you know how many kids have asked me to catch them a Pikachu? No worries about Zapdos, Don't worry I can catch a Cubone. But heaven forbid, I really need this Pikachu!
Pichu is flat out uninteresting to me, and Raichu is an oversized rodent. Pikachu is perfect.
I usually have a Pikachu on my team when I play Pokemon Red/Blue. It is one of the only decent, more good looking ones, in the first gen (not counting stats). I then evolve it into Raichu. It's pretty awesome even if Pikachu is somewhat overrated.