Super Mario-kun Volume 4

Super Mario-kun Volume 4 is the fourth volume of the manga series, ending the Super Mario World (main) story arc that began in the first volume, but some chapters also include elements from The Legend of Zelda: A Link to the Past and Mario Paint. In this part, Mario, Luigi, and Yoshi face the Valley of Bowser and finally have the final confrontation with Bowser. The Reznors (which briefly appeared in the second 4-koma of the first volume), Larry and Bowser are the bosses fought in the volume.

Stage One
とりつかれたルイージ！！　沈没船のわなを破れ！！ (Luigi is Possessed!! Break the Trap of a Sunken Ship!)

Mario, Luigi and Yoshi needs to return to the Valley of Bowser and save the real Princess Peach, but the cave entrance returned to the bottom of the sea. The trio notices a Sunken Airship not so far from the Chocolate Island coast and decide to check inside for some clues. Using Balloon Yoshi, the three reach the shipwreck, diving in it just as some flying enemies comes for them.

Inside the shipwreck, Mario and his friends find a bunch of Disappearing Boo Buddies. Using a giant painted sack to disguise as Big Boo, the heroes passes by. A skittish Boo tosses a coin on the ground and Mario jumps out to get it, revealing their disguise. The Boos attack them, but Mario and Yoshi manages to escape, leaving Luigi behind. When they notice this, Luigi comes back, but is much more angry and violent. Yoshi realizes that he got possessed by the Disappearing Boos.

Mario and Yoshi fights back, but each hit makes the possessed Luigi stronger and angrier. He grabs a ? Block and points to Mario and Yoshi: a vine sprouts out of the block and they two get tied and strangled by it. Mario notices an old ? Block and, making Yoshi hitting it, a Super Leaf comes out and Mario grabs it, becoming Racoon Mario. With one Tail Whip, Mario breaks free of the vine and hits Luigi, making him puke out all the Boos that possessed him. Luigi thanks Mario and the trio continues their exploring.

After entering a Warp Pipe, the three finds themselves in a tall and empty space, falling down whit Koopa Paratroopas and Floating Mines. In the middle of the enemy swarm, Yoshi notices a Super Star and Mario touches it with his tail, making it bigger and invincible. The three fall to the flooded bottom of the hall, where they find a Magic Ball. After grabbing it, the shipwreck shakes, and they go out to check, hoping to find the emerged Valley of Bowser entrance, not noticing that it's right under them.

Stage Two
危険なお札！！　クッパ神社で初もうで！？ (Dangerous talisman!! Bowser's New Year Shrine!?)

Stage Three
お年玉争奪戦！！　マリオを倒すのはだれだ！？ (Lottery Competition!! Who Will Defeat Mario!?)

Stage Four
マリオの伝説！？　ゼルダ世界(ワールド)で大暴れ！！ (The Legend of Mario!? Zelda World on Rampage!!)

Stage Five
かぜに負けるな！！　ヨッシーどとうの大奮戦！！ (Don't Succumb To The Cold! Yoshi's Raging Big Fight!!)

Stage Six
クッパ城目前！！　スイッチ宮殿をさがしだせ！！ (Koopa Castle in Sight!! Find the Switch Palace!!)

Stage Seven
ハックン軍団襲来！！　忍者の里で大激闘！！ (Ninji Army Invasion!! A Great, Fierce Battle at Ninja Village!!)

Stage Eight
聖(セント)バレンタインの悲劇！！　マリオついに死す！？ (St. Valentine's Tragedy!! Mario Finally Dies!?)

Stage Nine
食いしんぼうばんざい！？　ちびヨッシー大活躍！！ (Gluttonous Charge! Little Yoshi's Outstanding Performance!)

Stage Ten
マウスは災いの元！？　怪獣マリオ出現！！ (Mouse of Death!? Monster Mario Appears!!)

Stage Eleven
クライマックス！！　マリオVSクッパ最終決戦！！ (Climax!! Mario VS Bowser, the Final Battle!!)

4-komas
ピーチとクッパの スーパークリスマス (Super Christmas with Peach and Bowser)

Puzzles
マリオスーパー迷路 (Mario Super Maze)

Trivia

 * The second 4-koma introduces, for the first time in the Mario franchise, Peach's passion to bake cakes.
 * Due to the Spinies infesting it, it is revealed that the Switch Palace in chapter 6 is the Forest of Illusion's one, the Blue Switch Palace. However, in the previous volume, Mario and his friends were still in the forest when they fought the brainwashed Rex and defeated it by pressing the ! Switch and raining ! Blocks on it.
 * In chapter 9, it is revealed that all the seven Yoshi's Eggs were rescued, even though Mario and his friends skipped Lemmy's Castle, and Roy was fought outside of his castle.