Mario made his first appearance in an arcade game named for its antagonist, this guy
Double points: what was Mario's original name in that game?
Donkey Kong
Mario was named "Jumpman" until the sequel, Donkey Kong Jr.
After collecting all 120 Stars in Super Mario Galaxy (1 or 2), you unlock the ability to re-play the entire game as this character
Luigi
This Mario Kart 64 track was so long that, when they ported it to Mario Kart 8, they shortened it to a single lap
Rainbow Road
This Mario spinoff series has 12 mainline entries, totaling over 900 minigames combined
Mario Party

Which game is this from?
Rocket League for the Nintendo Switch
Mainline 2D Mario games were thought to be dead after Mario Maker (2015) -- until Nintendo released this un-recreatable game in 2023
Super Mario Bros. Wonder
This Mario Kart Wii character is one of the hardest to unlock normally, but she's unlocked automatically if you have an active Super Mario Galaxy save file on your Wii
Rosalina
Other ways: play 4950 races, or get 1 star on every Mirror Mode cup
Name 4 ways to avoid getting hit by a spiny shell that is locked onto you in Mario Kart 8
Super Horn, Mushroom, invincibility items (Star/Boo/Bullet), i-frames, falling off the track
The game Mario _____ (2000) introduced the world to Waluigi as Wario's doubles partner
Tennis
An NES furniture item, complete with a fully-playable Super Mario Bros., appears in this 2001 life sim game by Nintendo
Animal Crossing
In the original Super Mario Bros. (1985), how high can small Mario jump, as a multiple of his own height?
5x
Super Mario 64's much-maligned camera is operated by this character on a cloud with a fishing rod
Lakitu
In Mario Kart: Double Dash!!, characters race in pairs.
Which pink character was introduced for the first time in this game, as a partner for her male version?
Toadette
This version of Mario dons a head mirror to drop vitamin capsules onto viruses
Dr. Mario
Mario appears as the referee in this legendary NES boxing game
Mike Tyson's Punch-Out!!!
This character was first introduced in Super Mario Bros. 2 (1988), with the English instruction manual describing them as, "he thinks he is a girl and he spits eggs from his mouth"
Birdo
He's the main antagonist of Super Mario Sunshine (2002), but later becomes Mario's paintbrush-wielding companion in Bowser's Fury (2021)
Bowser Jr.
Mario Kart Wii features two items that do not make an appearance in any other entries. Name either one
POW Block, Thunder Cloud
It's not a 2D Mario game -- it's an RPG set in a 3D world -- but he sure is a 2D Mario
Paper Mario

What game is this screenshot from?
The Legend of Zelda: Ocarina of Time
Name a speedrunner who has held a world record in any 2D Mario game.
Name 10 enemies that can be captured by Cappy in Super Mario Odyssey.
(Para)Goomba, Chain Chomp (regular/big/golden), T-rex, (Bullet/Banzai) Bill, Knucklotec Fist, Cheep Cheep (normal/snow), (Fire/Poison) Piranha Plant, (Fire/Pan/Hammer) Bro, Uproot, Sherm, Wiggler, Ty-foo, Gushen, Lava Bubble, Pokio, Parabones, Chargin' Chuck, Bowser
One of the few characters from outside Mario franchises to appear in Mario Kart games, he only appears in Mario Kart DS, as the final unlockable.
He also appears in all Super Smash Bros. games as of Brawl.
R.O.B.
This crossover Mario game for the Wii features the event "Dream Curling", where you slide a curling stone into bowling pins
Mario and Sonic at the Olympic Winter Games

Which NES game features this win screen?
Tetris