I don't think Waluigi will get his own game. But they would can put him in a main game or in a RPG. And he deserves to appear, he has got a lot of success. Otherwise he wouldn't appeared in later games.
How do you explain me two guys that resemble a lot and have lot in common between...
Bowser's Mario's enemy. Wario is Mario's rival.
King Boo is (most probably) Luigi's enemy. Waluigi is Luigi's rival, so I think they made him for Wario and Luigi in Mario Tennis. (or just for Wario, the stuff with Luigi could come later)
Also I think Wario wand Waluigi are brothers! >:(
It's okay, better than Paper Mario (Mario Story). But I prefer Super Paper Mario for reasons that I won't explain now.
Don't compare the Marioverse and Fire Emblem. It would be the same if we compare The legend of Zelda with Fire Emblem (we know The legend of Zelda is better for some reasons)
Mario Kart games are spin-offs, but all them were made by Nintendo (less Mario Kart Super Circuit, it was made by Intelligent Systems). That means Waluigi is property of Nintendo now.
Sometimes in Final Fantasy Crystal Chronicles: Ring of Fates, when I'm landing after a jump I fall into a bottomless pit when there is land everywhere.
I know that is not confirmed, but I want to beleve that until nintendo says something.
It's the same of what you said. They have never said anything about Toad and Toadette's relationship, but I consider them as a possible couple.
Peach is for Mario
Daisy is for Luigi
And Pauline is forever alone
Nintendo can change their thoughts about Mario relationship, that's why in some Mario games is told that Peach and Mario are a couple and is not explained anything between Pauline and Mario.
I consider Wario and Waluigi as brothers. But they are not related to the Mario Brothers.
Why brothers? They are very similar and they are the "extreme" versions of the Mario brothers.
Re: What are you listening to right now?
Super Mario 2007 - Super Mario Galaxy Original Soundtrack Platinum Version (by Mahito Yokota & Super Mario Galaxy Orchestra)