This hack makes both classic and new Simon from Castlevania Chronicles playable in Portrait of Ruin, to install do the following,
1. Download Lagolunatics tool here github.com/LagoLunatic/DSVEdit/releases/tag/v1.7.2 and create a folder for it and extract it within that folder 2. Secondly download my hack and extract into a new folder (name it whatever you like) afterwards you should have multiple hack folders within your new folder. 3. Open the DSvania tool go to File and choose Open Folder and choose the new folder that you just created that contains the hack files, once DSvania loads it up choose File and click Save and then choose Build to Build the rom, once you have done that check the folder that contains the hack files and you should see a new file called "built_rom_por" which the modified rom ready for you to play and enjoy, and then your done.
Anymore questions feel free to ask here I will gladly help out.