In the name of "Show, Don't Tell," here are some fun examples:
Super Mario Bros 3 (NES + Game Genie) equipping Hammer Suit / Invincibility:
https://www.youtube.com/shorts/FUVOM3rxZ5U
Super Mario World (SNES + Game Genie) causing weird memory distortion glitches, enabling swimming anywhere, and other more useful things:
https://youtu.be/o7_eFcpwq24?si=_io5oSzpRxdvuEMp&t=164
Super Mario RPG (SNES + Game Genie) enabling the hidden developer debug menu:
https://youtu.be/bH-uh9BnIfU?si=0L7qviRp5T-Nokjs&t=402
Pokemon Red (Game Boy SP + Game Genie) unlocking the unobtainable Mew (which Nintendo only gave away at rare in-person tournament events) at game start:
https://www.youtube.com/shorts/yzqTRbixnak
Zelda Link's Awakening (Game Boy + Game Genie) changing the value of "1" rupee to "255" rupees for effectively infinite currency (the creator isn't aware of the significance of "255"):
https://www.youtube.com/shorts/dRFqU_Dz3M8
Super Mario 64 (N64 + Gameshark) adding Dorrie the Plesiosaur to Lethal Lava Land:
https://youtu.be/DVBMdwn8Kc0?si=cUZ5ioG1GEvY0l-H&t=84
Super Mario 64 (N64 + Gameshark) showing off the Gameshark menu and a bunch of Mario character animation swaps:
https://www.youtube.com/shorts/AptK2MbqLXQ
Banjo-Kazooie (N64 + Gameshark) replacing the main characters with the Rareware logo and adding an "infinite jump by pressing A" hack, which adds displacement or velocity with a button press (yes, this is totally absurd):
https://www.youtube.com/watch?v=XF6pwm00vtY
Zelda Ocarina of Time (N64 + Gameshark) spawning a hidden developer-only enemy, the Starfox Arwing, which shoots lasers at Link:
https://www.youtube.com/shorts/KOQUhm1cNu8
Smash Bros 64 (N64 Emulator) spawning Master Hand (final boss) as a playable character in a standard stage:
https://www.youtube.com/watch?v=A1i9TRLifaw
Zelda Majora's Mask (N64 + Gameshark) spawning special items, equipping the wrong items, using the wrong weapons, manually adjusting the clock, etc.:
https://youtu.be/ae2q9CjqXsc?si=IPB7XcPFWZyzpbh3
Smash Bros Melee (Gamecube emulator) spawning infinite items and damage for total chaos:
https://www.youtube.com/watch?v=IDZZiL4rqlk
Quick Game Genie hardware overview:
https://www.youtube.com/shorts/WzHokvjdvDc
Super Mario Bros 3 (NES + Game Genie) equipping Hammer Suit / Invincibility:
https://www.youtube.com/shorts/FUVOM3rxZ5U
Super Mario World (SNES + Game Genie) causing weird memory distortion glitches, enabling swimming anywhere, and other more useful things:
https://youtu.be/o7_eFcpwq24?si=_io5oSzpRxdvuEMp&t=164
Super Mario RPG (SNES + Game Genie) enabling the hidden developer debug menu:
https://youtu.be/bH-uh9BnIfU?si=0L7qviRp5T-Nokjs&t=402
Pokemon Red (Game Boy SP + Game Genie) unlocking the unobtainable Mew (which Nintendo only gave away at rare in-person tournament events) at game start:
https://www.youtube.com/shorts/yzqTRbixnak
Zelda Link's Awakening (Game Boy + Game Genie) changing the value of "1" rupee to "255" rupees for effectively infinite currency (the creator isn't aware of the significance of "255"):
https://www.youtube.com/shorts/dRFqU_Dz3M8
Super Mario 64 (N64 + Gameshark) adding Dorrie the Plesiosaur to Lethal Lava Land:
https://youtu.be/DVBMdwn8Kc0?si=cUZ5ioG1GEvY0l-H&t=84
Super Mario 64 (N64 + Gameshark) showing off the Gameshark menu and a bunch of Mario character animation swaps:
https://www.youtube.com/shorts/AptK2MbqLXQ
Banjo-Kazooie (N64 + Gameshark) replacing the main characters with the Rareware logo and adding an "infinite jump by pressing A" hack, which adds displacement or velocity with a button press (yes, this is totally absurd):
https://www.youtube.com/watch?v=XF6pwm00vtY
Zelda Ocarina of Time (N64 + Gameshark) spawning a hidden developer-only enemy, the Starfox Arwing, which shoots lasers at Link:
https://www.youtube.com/shorts/KOQUhm1cNu8
Smash Bros 64 (N64 Emulator) spawning Master Hand (final boss) as a playable character in a standard stage:
https://www.youtube.com/watch?v=A1i9TRLifaw
Zelda Majora's Mask (N64 + Gameshark) spawning special items, equipping the wrong items, using the wrong weapons, manually adjusting the clock, etc.:
https://youtu.be/ae2q9CjqXsc?si=IPB7XcPFWZyzpbh3
Smash Bros Melee (Gamecube emulator) spawning infinite items and damage for total chaos:
https://www.youtube.com/watch?v=IDZZiL4rqlk
Quick Game Genie hardware overview:
https://www.youtube.com/shorts/WzHokvjdvDc