The best Kirby game in the universe (other than its remake of course). This game right here is possibly one of the most unique Kirby games of all. It has 9 different games in it. (yeah the box lied, there's not 8, there's 9). Something else only found in SS and SSU was the partner system, where when Kirby gains a copy ability, most of them can be energized into a physical body called a partner. Kirby could only have one partner at a time.

The 9 games are the following...
Spring Breeze - the most basic of the games, this one here is the classic Dedede vs. Kirby.
Dyna Blade - Introduced the level selection based on map in the Kirby games, rather than a doorway as by the older games.
Gourmet Race - A race of Kirby vs. Dedede to see who could eat the most food before the finish line.
The Great Cave Offensive - Kirby gets trapped in a cave and must navigate it for unique treasures.
Revenge of Meta Knight - Meta Knight sends his Halberd a flyin and Kirby has to stop it....that's all we know
Milky Way Galaxies- My personal favorite. This brings back the map system shown in Dyna Blade, but rather than sections, you travel by planet.
Megaton Crush - Kirby must face off against three of his enemies to see who can create the biggest crack in the planet Pop Star
Samurai Kirby - A classic faceoff between two samurai warriors. Kirby vs. one of 5 foes (Waddle Doo, Wheelie, Chef Kawasaki, King Dedede, and Meta Knight)

What about The Arena, The true arena, Metaknightmare ultra, and revenge of the king?

Those were in KSSU not KSS. This is the SNES version...although I did forget the Arena...*facepalm*

Okay, Arena- This is the culimination of all the bosses of KSS.