In Kirby Super Star (and Ultra), it is the Arena. Spring Breeze is probably the best tutorial ever made in history (It has an introductionary speech on how to play the game which is entirely skippable, and then lets you play a shortened Kirby's Dream Land), Dyna Blade gives the game a challenge without making it too hard by making the maps more complex (Though, the bosses are much easier than they are in Spring Breeze, due to all of them except Dyna Blade is really just a mini-bosses). Great Cave Offensive is very deep Metriodvania like game, with some complex puzzles (However, unlike Metriod and Castlevania, no item is nessercary (They don't do anything but bragging rights; one entire area, including its boss, can even be skipped.) Gourmet Race is really just a mini-game, but its fun to try to get the fastest time possible while getting the most food possible. Revenge of Meta Knight is my favorite game. Its a race against time to get from point A to point B, and the game throws everything possible to stop you. Milky Way Wishes, however, shows the true potentional of the engine. It has a deep plot (RoMK also had one, but was screwed up in translation, and anyone whom takes the dub plot seriously should be laughed at), the ability to explore Kirby's entire solar system on your leisure, and the removal of copy abilities, and instead of permanently getting an ability from visiting certain areas make it harder and yet more rewarding.
So, the games get better on, and the last one finally appears. What is it? IT'S A FREAKING BOSS RUSH! Seriously? After Milky Way Wishes, the world was theirs, and they chose a /boss rush/? Its not even hard! All you need to do is Hammer Flip (Up + Attack with Hammer) and they all are dead!
The Remake adds Revenge of the King, which is a harder Spring Breeze (Its based off the hard mode in Dream Land, after all) with two new levels, stronger enemies and bosses, and yet was still fun (But they still doesn't have Castle Lololo as a separate area, but at least Kaluba is back). Meta Knightmare Ultra allows you play the original game as Meta Knight (Minus anything pass the Reactor in RoMK (He would then have to fight himself, and then flee from himself. Wouldn't Work), and instead of fighting Marx, you fight Galactica Knight), which is basically Sword with more attacks, and some spells (The "Heal" Spell, which only requires you to get five kills to use, trivializes the game). Now what? TWO MORE BOSS RUSHES!!
Helper to Hero is a shorter Arena (With less healing items, as well), but allows you to play as the Helpers, which makes you weaker but prevents you from losing your ability (Also, Wham Bam Rock becomes a two form boss, with Wham Bam Jewel being his second form. In my opinion, Jewel is easier than Rock, but has more way health) The True Arena is even shorter than Helper than Hero, but half the healing items are gone, and it uses the hard mode bosses from Revenge of the King, plus Wham Bam Jewel, Galactica Knight, and a revived Marx Soul. True Arena is probably the only time in the entire /series/ I would call "controller throwing hard", so I also like it. But I still hate the original Arena!
The combat was kinda annoying with it tho, but only about 1% of the mako part was combat.
