Originally Posted by gold
How could you evolve pikachu!?!
You'd need a thunderstone and you can only get them in celadon and they cost $2100!!!!!!!!!
The world's crazy! Ahhhhhhhhh!
Uhh... I'll admit that's true... But you can have traded Pika by then and evolved it on another cart. That's the only thing that could have happened, seeing as you can't evolve it on Yellow.