Kirby: Right Back at Ya! originally debuted in Japan in 2001, and was brought to the US by 4Kids Entertainment and picked up by Fox in 2002. Kirby originally appeared in this country in a video game issued by Nintendo in the 80's, and had been largely forgotten until the launch of this cartoon, which ended production in 2003. I believe Fox managed to air the entire series before sending Kirby on his way.
In this series, Kirby is the protector of Dream Land, which is under the rule of a despotic king. I think that's about all you really need to know, as there are few, if any, video game elements included in the series. PaperMario15 uploaded the episode, "A Princess in Dis-Dress", to YouTube:
The fact that the series lasted only 2 years, total, speaks to the fact that as a largely forgotten video game hero, Kirby was facing an uphill battle in making a comeback.