Answer: Wario
In the 15+ games that makeup the "Mario Party" series, only "Mario Party Advance" didn't feature Wario.

Answer: Stan Lee
Comic-book visionary Stan Lee, who passed away in 2018, is now featured as a NPC in "World of Warcraft".

Answer: Epic Games
Alfonso Ribeiro, former costar of "the Fresh Prince of Belair", filed a lawsuit against Epic Games, Fortnite's developers, over an emote dance that can be purchased in the game appropriately called "Fresh".

Answer: The Chozo
The Chozo not only adopted Samus but are the inventors of the Power Suits she uses throughout the series.

Answer: Fire Emblem: Thracia 776
"Fire Emblem: Thracia 776" was the last game published for the SNES as a physical cartridge on 21 January 2000.

Answer: Wu-Tang Clan
Released in 1999, "Wu-Tang: Shaolin Style" even resulted in PlayStation producing a custom controller shaped like the Wu-Tang Clan's logo.

Answer: Jordan vs. Bird
Michael Jordan first made an official appearance in 1988's "Jordan vs. Bird: One on One" by Electronic Arts. He could not be featured in prior NBA-based games due to opting out of the NBA Players Association.

Answer: Corrupted Blood
Corrupted Blood was intentionally introduced to the "World of Warcraft" by its programmers via a supervillian, but it soon spread out of control and could only be eradicated by game patches and resets.

Answer: Adventure
A fact made famous by the movie "Ready Player One", "Adventure", a game released on the old Atari 2600 in 1979, had the first Easter egg, which was the name of its creator hidden in the game.

Answer: Playing cards
Founded in 1889, Nintendo originally produced traditonal-Japanase playing cards called Hanafuda.