PC versionWii Fans have made a PC version. Some are still early, so read the project page first.
Fans took Castlevania: The Adventure ReBirth (Decomp + PC Port) apart and rebuilt it so it runs natively on a computer, often with widescreen, higher frame rates and mods. Here is the project we know about:
Decompilation and native PC port of Castlevania: The Adventure ReBirth (WiiWare)