I accomplished this using a couple of cheat codes. One replaced Jonathan with Richter, another to unlock all the weapons, and one more to unlock all the subweapons. Interestingly enough Richter's version of the whip is in the game but needs to be hacked into the inventory to be usable, along with his Grand Cross item.
All of his moves are usable too. You can't whip diagonally like you can with Jonathan (even though his vfx still remain) but you can slide, tackle, uppercut is the same and the combo is performable. Interesting to note is that Richter's Grand Cross "item" plays his voice line, "Grand Cross!" even if you're Jonathan. I guess his vfx is tied to the item. Also worth noting is even though his whip fits his bones/sprite in Jonathan mode as Richter, the whip desyncs from his body. I guess the whip only truly aligns correctly in Richter mode itself.
Also I have no idea what the hell happened at the end of the video with the Charlotte Grand Cross.
![](https://i.ytimg.com/vi/zm4rNNvXkBw/maxresdefault.jpg)