Dr. Hello
Platform: Sega Master System
Region: Korea
Media: Cartridge
Controller: Master System Controller
Genre: Puzzle 
Gametype: Unlicensed
Release Year: 1991
Developer: Sis Co.
Publisher: Sis Co.
Players: 1 or 2
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Dr. Hello is an unlicensed Dr. Mario clone developed for the MSX and ported to the Sega Master System. It was developed in South Korea by a company known as "Sis Co." in 1991, without the backing from either Sega or Nintendo. The game uses a completely different set of graphics and music to Dr. Mario, but the gameplay is exactly the same.

Despite being released on a Master System cartridge, the Master System version runs in SG-1000 mode, and hence appears to have weaker graphics than most other Master System games. This is likely because the MSX and SG-1000 share similar specifications, and porting from one system to another was not too difficult.