Kirby's Air-raid

I probably noticed this detail just to then forget and repeat the process. But it's just interesting to me when games would tease other games. This part in Melee obviously teasing Kirby's Air Ride. Very fun game by the way you should play it. Do games still have Easter Eggs in them? Are they less common? I remember young me being so entertained by them but now I don't see them talked about anymore.