Edit:
Teh Icy-Im fine with leaving Kirby vs M2=until some other Kirby/Mewtwo players give their opinion.
1 votes K>M2
2 votes M2>K
More ppl agree M2>Kirby, not that it means much. Its just not decided upon.
M2>Yoshi-You will probably have to get confirmation for V3ctorman most likely-he plays both a good yoshi and mewtwo.
The M2 vs DK matchup comes down to Dk spamming bairs trying to force m2 to run out of space. M2 wins this matchup with offense. A well spaced bair is very hard to punish, but its not easy to connect with.
Dk is combo food for a M2. Sb>grab-dthrow>Dtilt(x2)>fair/nair/grab. All day! It just depends on the DI. M2 has a very strong combo game on Dk and he can rack up damage MUCH faster.
M2 outclasses DK in terms of speed and mobility. M2 has to maneuver around Dks bair while throwing sbs to force DKs actions. If DK puts up a shield or gets hit M2 has a good chance of getting the grab or Dtilt.
Whenever DK is facing m2 he is at a disadvantage defensively. DKs defense is his offense as soon as he makes contact with M2. DKs tilts seem to extend his hitbox and provide no real form of pressure, not to mention that any strong hit on m2 leads to nothing. If I can tech away you will almost never be able to get there in time.
Believe it or not, but DK is susceptible to SB camping. You cant spam bairs and deal with the projectile at the same time. If you arent spamming bairs, you lost the only thing you had going for you. DK can legitimately force m2 away, a little better than Zelda can but M2 can retreat to the other side more safely due to DK not having a fair. Retreating to the ledge is often a safe option, which can be achieved by light shielding or WD back oos.
In terms of edgeguarding, again its one sided. Dk doesnt have many options to keep M2 from safely returning to the stage. Conversely, M2s downsmash ***** DKs attempts at sweetspotting. SB can cause DK to lose very important vertical height, and coupled with a dair can mean an instant stock. The soft part of DKs up+B is CC and can be dealt with accordingly. Fsmash is a safe option that can punish any attempts to come above stage height.
Its bad, but alot safer for M2 to be on a platform than DK. M2 can teleport oos to escape while DK is praying he doesnt get hit by M2s nair/uptilt. Both can lead to effective followups.
DK has a good uair, and bair. M2s can deal with bair effectively and Uair doesnt combo at kill percents and is hard to get into a position to hit with it. You can cargo throw into uair until I certain percent, at which I honestly can recall, but DK has a shorter grab range than M2 and is definitely disadvantaged while facing M2. M2 doesnt aerially approach very often which limits the opportunities for DK to get any sort of vertical attack to connect.
M2 has to force DK out of his defensive stance because opportunities to break it are far and few between. Although forcing him out of it can be seen as breaking it LOL. Offensively M2 wins hands down. M2 handles the lower mobility powerhouses fairly well. A safe CP IMO because the outcome of the match will ALWAYS come down to the M2 player's ability to break defeat the zoning while being able to safely maneuver around it.
Stage(neutrals) size will only slow down or speed up the match, it doesnt change the advantage/disadvantage. DK can force M2 back on any stage and on smaller ones he looks to be more offensive. M2 has less leeway in terms of getting hit and living but on a stage like Yoshi's Story tech chasing can be menacing. The other amazing thing about YS is that its not terribly hard to put DK on a platform. When this is done it lowers the kill percent of M2s upthrow by about 7 percent per level.
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
DK is heavy but upthrow is fall speed only and therefore kills much lower than you would think. 128/138 on FD and Its substantially lower on YS. M2s pummel also increases the time of the grab and adds decent damage.
DK is a more mobile, BUT, more combo-able Zelda with a more predictable and easier to punish recovery.
Despite all of this, M2 is still bad and even with being heavily disadvantaged the MU only surmounts to M2>DK lol.
note: Even though DK can be approaching with bairs, I consider it defense because he is really just trying to keep M2 from coming in and taking his cookies.