History YMMV / YuGiOhMonsterCapsuleGB

** Fortress Whale floods the battlefield before you fight him, making it so his attacks hit ''every square on the map''. If you don't take him out immediately, it's very hard to win.

* AwesomeMusic: Like every ''Yu-Gi-Oh'' game, the music is a highlight, especially the mountain theme, the adventure theme, the water shrine, and the peaceful town theme.

* FunnyMoments:
** The Millennium Ring gets its own text box and speaks to the characters.
** In the post-game Yugi runs into Hirutani and is saved by Jonouchi, who punches Hirutani so hard he flies backwards at double speed offscreen. Making it funnier is that Jonouchi checks if Yugi's okay and then just leaves.

* ThatOneBoss: Fortress Whale floods the battlefield before you fight him, making it so his attacks hit ''every square on the map''. If you don't take him out immediately, it's very hard to win.

* NightmareFuel:
** The intro to the game details the Millennium Ring possessing Kaiba, and the start of the game proper has Kaiba performing a ritual that traps Yugi's friends in figurines.
** Seto Kaiba's RPG world is a literal representation of Hell. It starts with Yugi being captured and goes downhill from there.
** Before you go to fight Kaiba, Panik approaches you for a capsule monster duel. Losing it apparently kills you, and you get a game over.
** After you defeat the Blue-Eyes Ultimate Dragon and return to the real world, Kaiba fights against the Millennium Ring's control, screaming. It uses the same shot of Kaiba's Mind Crush from the manga with the Ring edited in, and the screen flashes white intermittently.

* FunnyMoments: The Millennium Ring gets its own text box and speaks to the characters.

* FunnyMoments: The Millennium Ring getting its own text box and speaking to the characters is pretty funny.

** The intro to the game, detailing the Millennium Ring possessing Kaiba and Yugi's friends being trapped.
** Seto Kaiba's RPG world, which is a literal representation of Hell. It starts with Yugi being captured and goes downhill from there.

** After you defeat the Blue-Eyes Ultimate Dragon and return to the real world, Kaiba fights against the Ring's control, screaming. It uses the same shot of Kaiba's Mind Crush from the manga with the Ring edited in, and the screen flashes white intermittently.

** Every world has at least one enemy who can hit hard in wide areas and tends to resist or avoid most attacks. Even worse are enemies that decrease your attack power in tandem with such enemies.

** Kaiba's overworld sprites and mugshots have neon green hair like the ''Anime/YuGiOhFirstAnimeSeries'', which ''WebVideo/YuGiOhTheAbridgedSeries'' would make memetic.

** Kaiba's overworld sprites and mugshots have neon green hair, which WebVideo/YuGiOhTheAbridgedSeries would make memetic.

** Firewing Pegasus in the final tower. They have excellent attack, decent health, high speed, terrain bonuses that let them have a very high dodge rate, and an unorthodox hitbox so they can hit you when you wouldn't expect them to. They're also unusually good at getting critical hits.

* DemonicSpiders: Every world has at least one enemy who can hit hard in wide areas and tends to resist or avoid most attacks. Even worse are enemies that decrease your attack power in tandem with such enemies.
** The most notable example would be Firewing Pegasus in the final tower. They have excellent attack, decent health, high speed, terrain bonuses that let them have a very high dodge rate, and an unorthodox hitbox so they can hit you when you wouldn't expect them to. They're also unusually good at getting critical hits.

** The most notable example would be Firewing Pegasus in the final tower. They have excellent attack, decent health, and terrain bonuses that let them have a very high dodge rate, as well as an unorthodox hitbox so they can hit you when you wouldn't expect them to. They're also unusually good at getting critical hits.

* HilariousInHindsight: Kaiba's overworld sprites and mugshots have neon green hair, which WebVideo/YuGiOhTheAbridgedSeries would make memetic.

* DemonicSpiders: Every world has at least one enemy who can hit hard in wide areas and tends to resist or avoid most attacks.

* NightmareFuel: The intro to the game, detailing the Millennium Ring possessing Kaiba and Yugi's friends being trapped.

* ThatOneBoss: Kairyu-Shin floods the battlefield before you fight him, making it so his attacks hit ''every square on the map''. If you don't take him out immediately, it's very hard to win.

** Seto Kaiba's RPG world, whcih is a literal representation of Hell.