I managed to get some dittos recorded with the other serious Robin around here so I wanted to leave it here and ask for some feedback or advise to both of us. They are online friendlys but still show something.
Preface: It is my opinion that in the Ditto, if one person runs Speed Thunder, you put yourself at a significant disadvantage unless you ALSO run speed thunder. The harassment capabilities it grants over Regular Thunder are way too good if used properly. See: Any of my sessions with Sonic Storm.
Meta
0:13 - I think you could've retreated that nair to safety there, but I'm not 100% sure.
0:19 - Bad recovery. You had 100% freedom to go to the ledge there.
1:09 - Grab there. Uair/Fair are only reliable if the projectile has a little travel time first.
1:40 - B-Throw! That probably would have killed him, given your positions on the stage.
2:36 - You'd have won the match right here if that Sour Uair lead into Bair instead of another Uair.
3:00 - You're getting sloppy with your landing attempts. Go to the ledge and regroup.
Chrom
0:05 - Should've started off by just running forward and taking center stage/stopping Meta's charge by firing off a few quick Thunder casts.
0:16 - That second Arcfire had a 0% chance of working. You need to jump if you wanted to land the second one, but more realistically you should've just converted this into a Fair chain.
0:42 - U-throw WHY? Should've been B-throw for Damage+ Ledge control, or D-throw. D-throw at that % was likely to force a hard landing trap, since his airdodge would collide with the platform above you.
0:53 - Space your ledge jumps better, that's the sole reason you got hit by that dash attack, and will get you bodied by Nair in the ditto.
1:03 - You need to work on your ledge pressure. Not only were your Arcfires in the wrong spot, but you then backed off and let Meta on the stage completely for free.
1:26 - That was a pretty pointless Arcthunder, it doesn't travel that far as Speed version.
1:50 - You really have to have a hard read (or be punishing a regrab) if you're going to use D-Smash to edge-guard. You at the very least need to do it in reaction to their get-up, not in advance. Meta just waited and you died for it.
2:43 - Why did you just walk away and completely give up stage control? You had plenty of time before the cannonball would hit, and at that percents you needed to make sure Meta wasn't getting a Thoron charge.
General Comments After Game 1
Chrom
You reeeeeeeeeeeeally need to be taking advantage of the stage control running Speed Thunder offers. In the ditto, if they are running regular, they should NEVER make it to a charge above Elthunder unless they've hit you offstage. Walk forward, Thunder, walk forward again.
You also have a seemingly non-existent offstage game, and that's probably the most important part to start with. Throwing Arcfire at the ledge isn't a catch-all solution, and Meta was avoiding them relatively easily. Start experimenting with Nair, Elwind, Bair offstage, and ledge-trumping.
Meta
I honestly don't have a whole lot to say in specific here. You lost because you got sloppy and started telegraphing your landings and fishing for the final kill.
Game 2
Meta
4:16 - That shouldn't have been a roll, a standard getup would've been fine. It wasn't placed perfectly.
4:56 - Nice Elthunders, but you need to be taking steps forward between them. Speed Thunder is about the combination of harassment and stage control.
5:06 - *narrows eyes* That was nowhere in the neighborhood, and you could've easily been Elwind spiked in retaliation.
Chrom
Distant Nos what? Ok. You weren't really attempting regular Nos at all, so I'll see how this works out before I criticize taking it.
4:34 - You got hit there because you used your double jump right after getting hit. Hang onto it, you need it as a mix-up tool.
Good stage control so far, as an aside comment.
4:50 - That Dair should NOT have worked. If that had been blocked, you'd have been killed for it by a charged F-Smash.
Ok, so it got attempted a few times, but you never landed Distant Nos. I don't think it's worth it.
Time to play Monster Hunter. Might do Game 3 later.