Soul of Darkness

Originally released for J2ME and BREW feature phones (you know, those things with a small screen and numeric buttons below it that were a standard in the 2000s decade), this platformer by Gameloft tries to mimic gameplay from the Castlevania series, though the game itself is pretty linear and simple. You can also upgrade your swords with Soul Shards either during or after completing a level.

All HP/MP upgrade fragments collected as well. Only thing not shown here is the Bonus tent that uses the camera for extra HP/MP refill or Soul Shards, and that isn't emulated on Bizhawk's melonDS core.