weird smelling chicken
Unfortunately, the only responsible advice anyone can offer about "weird smells" is to throw it out. Of course, you have to know what fresh, properly stored chicken smells like, but if unidentified or "off" smells have developed in your poultry, you don't want to play with that stuff -- throw it out.

Cooked chicken is a bit trickier. You don't know what unfamiliar flavors might have developed from your seasoning or what other tastes/smells might have been picked up in the cooking process. That is very difficult to comment on authoritatively. The best way to assure food safety is to be meticulous about cross contamination and proper storage of the raw product.

So just a few quick notes on that subject -- the best assurance of food safety is heeding the freshness dates and meticulously assuring proper handling and refrigeration in storage. Spoiled or "off" chicken smells have more of a sour quality than that classic sulfur odor... but don't rely on that. There is no reliable "smell test" to assure food safety, particularly in poultry.