If he's sneezing frequently, I'm going to assume that he has a cold. If he's really lethargic (lazier than usual, sleeping a lot, slow-moving), I would suggest just checking in with the vet, to make sure he's not seriously ill. I doubt that's the case, but you can never be TOO sure!
I don't think there IS a spiky-eared (aka notched-ear) Pikachu. If you mean PICHU, the pre-evolution, there's a possibility to get him in Pokemon HeartGold or SoulSilver.
To do so:
You have to first obtain the Pikachu-colored Pichu. To do this, you can bring your Nintendo DS and a copy of Pokemon Diamond, Pearl, or … Read more
On Amazon.com, G-Shock watches cost about $97.
In stores, such as Sears or Target, they cost about $100 (Sears), and up to about $90 (Target). It kind of depends on the exact style you want, though. Standards are cheaper than Atomic Solars, for instance.
Hope this helps!