Just saying, Marth versus Toon Link isn't a even match.
Marth have advantage here.
Lol, I never noticed that EL put it as even. xD
But yes, Marth has the advantage. Toon Link has no IASA moves like Dtilt to poke and bait opponents besides projectiles. His safest moves on block sans projectiles are literally his AAA jab and Zair due to its range [compared to the rest of his moves].
Marth can easily kill/block all of Toon Link's projectiles, a staple of his game even on the offense. His projectiles are very good, but because they're not the fastest things out there, they are very easy to shield. Only the bomb should really be an issue here (shielded bombs bounce off and TL can send another and capture the first one that bounced off, and can play an annoying pressure game with bombs since they can set-up for some 0-70% juggles) but the Links have always had ample support from their bomb game in Smash.
Once you get into range for tippers, Toon Links will indeed try to pressure you out with Nairs, Bairs, bombs, Boomerangs, grabs, tilts, jab, Zair, anything they can do to stop you, because they are in constant disadvantage to Marth as long as it's close combat.
In the air, Toon Link is even with Marth has he can juggle much more easily than Marth can, and his Uair is a lingering hitbox that you can chase a descending Marth with. If you stay mostly on the ground though, Toon Link can't really compete with you.
Toon Link's hit and run game can't compare against Marth when he has stuff like DB and Dtilt that Toon Link has no choice but to get out of before he can punish (he has Up+B if TL's in a crunch, but like I said, it's still a hit and run game, Up+B gives TL some breathing space and emphasizes hit and run).
If Toon Link goes for the offensive, Marth still has the advantage because Marth has a mad keep away game too. Dtilt, retreating Fairs, retreating Bairs make it so that even more aggro Toon Links usually have to alternate to a more defensive style most of the time. Also, if it's rushdown versus rushdown, it's pretty much Marth that pulls out as the winner for reasons I stated before.
6:4 Marth's advantage. The way you wrote the analysis for Toon Link made it seem kinda like that too Emblem Lord. =P
Is everything I said pretty solid Kizzu? You played Toon Link longer than I have, and you probably have more experience versus Marth with him too. I've only played against Marth with Toon Link a few times, so I'm not too sure my point is sound.