From the Super Mario Wiki
Radical Entertainment is a video game developer based in Vancouver, British Columbia, Canada founded in 1991. They are responsible for making the two Mario edutainment games, Mario is Missing! and Mario's Time Machine. The company is now an entirely owned subsidiary of Activision Blizzard after being acquired by Vivendi Games in 2005. Outside of the Mario franchise, the company is known for their work on the Crash Bandicoot and PROTOTYPE series.