I'm currently working on Viewtiful Joe 1, but I might hit up 2 while I'm working on it, because the engine is almost the exact same, the mechanics also run parallel, Gonna post the tech found in Viewtiful Joe and look into if there's anything to apply exclusively to this game.
Tech
Uppercut Cancel (UPC): Using an uppercut, cancelling it into an attack (traditionally, a kick) ad infinitum, this is optimal movement until you get slide or mach speed. Jump only when absolutely neccessary and only with the minimal frames needed. The execution differes from normal Joe and Viewtiful Joe;
Normal Joe has limited cancel routes and can only do 5 reps of UPC normally, but combined with Combo Resets (see below) he can UPC infinitely.
Viewtiful Joe has infinite cancel routes and can UPC just using standard kicks as the cancel.
My testing has shown that UPC gets the best speed when you uppercut for 5 frames and cancel into kick on the 6th, in situations when this would hit an item box (1 frame loss), you can do 4 frames and cancel on the 5th.
Silvia cannot UPC for movement as her uppercut does not move her forward. Joe exlusive.
Jump Cancelling: you can jump cancel any attack at any point in the animation, barring hitstop where inputs aren't accepted. This is used to cut recovery.
Hitstop: Every attack has 1 frame of hitstop, cancels won't register if inputted on that frame.
Immediate Attacks (IA): If you're facing the enemy and already dodging the right way, the enemy's attack triggers instantly when they decide to attack. Meaning no build up telegraphing the attack.
Power Up Menu: Changing selections in the Power-Up Menu is done in 7 frames, no inputs accepted during this time.
Combo Reset: Using a uppercut and a sweep during a combo to reset the combo order, to make sure you're only using the fastest attacks in any given sequence before you get zoom in.
Combo Skipping: Basically combo resets but applicable to mach speed.
Optimal combos - Before you get zoom in, make sure your killing blow is uppercut as it's Joe and Silvia's fastest move.
iirc Silvia's attacks are weaker than Joe's by default so that's a downer. And the fact that she can't UPC for movement is a huge blow back too.
Combine with the fact that she doesn't get mach speed, it seems we'll only be seeing Silvia when she's mandatory (replay or lightning effect) or in the auto-scroller on 5-2. Perhaps there may arise situations where she can deal faster dps than Joe since she has a gun and a lock-on power up, I hope so because Silvia tech would make this TAS stand out from Viewtiful Joe 1 in terms of what players and viewers can expect.
In any case, I'll be looking to work on an Adults any% very soon.
Current Projects
Viewtiful Joe - Adults any% (FIRST TAS!)
Future Projects
Viewtiful Joe 2 - Adults any%
Viewtiful Joe 2 - 36 Chambers any%
Maybe something Ultra V-Rated if there's a demand.