I'm always trying to emulate strategies and cheeses I see on V4 submissions but the game always punishes in such a way that it doesn't work anymore, such as infinite juggles and rhythmically freezing enemies and bosses in place.

Depends what you run on. V04 is current PC/steam version, V03 is current console versions.

On the main menu/character select/etc screens it should say in faint writing at the very bottom-right of the screen what version you are on.