Can't have a references thread without Smash, here is a list of all the Wario content in Brawl:
Characters and colour skins
-Wario with both Biker suit and overalls, 16 colour skins overall, which includes the Game Boy colour skin.
-Mario still has his Wario skin, like in every Smash game.
Stages
-Wario Ware Inc. which includes the following microgames:
Crazy Cars - WarioWare, Inc.: Mega Microgame$
Sole Man - WarioWare, Inc.: Mega Microgame$
Arrow Space - WarioWare, Inc.: Mega Microgame$
Kitty Cover - WarioWare, Inc.: Mega Microgame$
Crack Down - WarioWare, Inc.: Mega Microgame$
The Maze That Pays - WarioWare, Inc.: Mega Microgame$
Butterfly Stroke - WarioWare, Inc.: Mega Microgame$
Blowin' Up - WarioWare: Touched!
Lose Your Marble - WarioWare: Touched!
There is also a microgame that forbits the players any movements, which might be based of the Twisted microgame "Fragile".
"Taunt" is an completely original game, that blesses us with a Jimmy appearence:
View attachment 366
Songs
-Wario Ware Inc.
-Wario Ware Inc. Medley
-Mona Pizza
-Ashley's Theme
-Mike's Theme
The Vocal tracks have both japanese and english versions.
The victory theme can be found on page 3.
Assist Trophys
-Kat & Ana
Trophys
-Wario
-Wario Man
-Wario Bike
-Kat & Ana
Stickers
-Wario - 64 DS
-Wario - Super Mario Strikers
-Wario - Smooth Moves
-Wario & Bike - Mega Party Game$/MPS
-Wario Man - Touched
-Wario World Symbol - Wario World
-Tiny/Mini Wario - Virtual Boy Wario Land
-Wario Car - Mario Kart Double Dash!!
-Mona - MPS
-Mona - Touched
-9-Volt - MPS
-9-Volt - Touched
-Dribble - MPS
-Spitz - MPS
-Jimmy - MPS
-Orbulon - MPS
-18-Volt - Touched
-Kat - Touched
-Ana - Touched
-Dr Crygor - Touched
-Ashley - Touched
-Penny - Smooth Moves
-Young Cricket - Smooth Moves