Okay, so I think
"Rushlink" is entirely a new gameplay mechanic that hasn't been mentioned yet for the Royal Edition (Check my previous post about the datamine). Every character, including the 3 temporary characters in the original game, have voice lines for it.
This is pure speculation, but I've found a few reasons to believe it.
The reason why I think this, is after checking the data for a while, I think Link Strikes are represented by
"Succeed", as in a character probably succeeding in the end of your attack with a Link Strike:
Now you might ask why I think that, well because of this:
Iris has her own dialogue when performing link strikes, I think we know this. The only thing is that I couldn't find any for Cor and Aranea, but whatever this is speculation lol.
As for Cross Chains, I think they are represented by
"Combination", and for obvious reasons that makes sense :
When I searched for the term combination, it is only associated with Melusine, the monster that initiates the ability to perform Cross Chains, as well as basic
"Combination" lines in the file:
For fun, these are definitely the voice lines for the original Armiger, known as
"Phantomburst":
Why do I think that? Well Phantom is used to describe the action in Japanese and there's also this:
GOTY lines have something called
"GOTY Phantomburst", which I'm going to go out on a limb here and say that it probably has to do with Noct activating Armiger Unleashed.
Perhaps, perhaps not, we'll see how it all goes lmao.
Tl;dr: "Rushlink", a term only with GOTY text lines, is not a Cross Chain or Link Strike, but it might be a brand new mechanic introduced in the Royal Edition.
Again, I'm probably wrong, but there's a chance that this is something new.