CP Marth to Halberd, Castle Seige or Final Destination according to me. And yeah I agree with you Chibo, those MU numbers are a little... LoL. But I suggest we discuss them after we have finished Ganondorf, because the Meta Game improves more.
I play the Wario MU very often, at least against two Wario mains. And I say that Wario has the favour in this matchup. His aerial game beats our due to his great aerial mobility + that annoying bite and Dair as well as Uair (which can juggle us to death, especially on platform stages). But if he Dairs, you can D-smash or shield-grab that (note that he is the hardest to shield grab), and if the Wario does a jump input when you grabbed, then he will be grab released and you have a free Uair or Up-smash, but other attacks work too (especially if it's an offline battle, you can often hear if they struggle out or pressing the A+B button).
Try to kill Wario vertically, because he has the best air acceleration in the game, which means = the best horisontally DI. So don't stale your Nairs or Up-throws. Or else, try to gimp Wario with throws or Fairs offstage, read him and gimp.
When you are offstage, he will usually follow you down and fart (it can kill you at 50 %), this has happened to me many times! He can safetely survive back onstage, so be carefull. But you have options: Either you can air dodge, do a Fair, follow down and "sideswip" the bottom blastline, Uair or even footstool! Don't even try to Nair for obvious reasons. Just have patience and stay long in the air, till he gets back. And try to always recover low (and do an/a Uair/Nair) if you want to avoid Uair juggles. Oh and a trivia: You can't air dodge out of his Cork Screw (Up-b which is rare to see / hear =P).
Wario loves when people approaches him, so make him approach using lasers and gyros, but the Wario can still be smart and wait, because the fart is going to charge. And Wario is still hard to hit, because he has the longest air dodge + his small size and lives like forever. Wario has excellent pressure, not to mention his farts. When I'm at a damage like 100 %, I usually camp till I see that the fart is fully charged, because it comes out at later frames and loses killing power than the third/fourth fart. I get relieved then, becasue it's not as dangerous. Wario also has a great grab range, so if you Fair him and he shields it or you miss = shieldgrab. So when he approches, use D-tilt, Bair or retreating Fairs. If he's above you, time an Uair or Up-tilt (my favourite), or to be at the safe side; roll away.
I usually pick a stage that I am comfortable with, like Castle Seige, Final Destination (!) or Halberd. I think that Wario doesn't like big stages, because we can outcamp him. He prefers small stages like Brinstar (his best stage) or Battlefield (if we grab release him here, he will usually land on a platform and shield, but try to Uair or Up-smash him, and you can start your short D-tilt here if you Up-smash. But he can move very far away whilst D-tilt locking, so just D-tilt like 3 times before following up like D-smash), because they have perfect fitted platforms for him. Just look at the heights! I usually CP Final Destination against him. We can camp here, the fart pressure and killing power reduces, and we can also grab release him easier due to no platforms. And Ban Brinstar!
Your grab means so much, and that's why this is slightly in Wario's favour. Watch out for the bite. Fair (rather retreating)/Bair instead of F-tilt due to the risk being shield grabbed. Never approach; Wario doesn't have any projectiles (well okay, semi-projectiles, his tires, which is fun to play with and glide-toss anyway). Jabs do wonders in this MU too. Try to kill via gimping instead of killing.
R.O.B. has a disadvantage at 45, and Wario 55. So R.O.B. has 45:55 against Wario.