Is waluigi going to have his own game

Possibly, since almost EVERY single character (even Peach; ew!) has their own game. Oh, and Birdo is with Yoshi in some other game, so that counts as Birdo having her own game. I'm pretty sure that maybe Waluigi could show up with Wario, like take his place as an example scenario. It's similar to when Mario is trapped, yet Peach has to go save him in that Peach DS game (ironic twist, eh?). So, I hope that Waluigi too has his own game (not fair that Luigi gets his own haunted mansion; who wouldn't want to live in that wacky house?). Thanks for your question; that really got me thinking about it! You should send that suggestion to the Nintendo company. Who knows? Maybe they'll do it someday!