Yeah,
twincharging has been popular a few years back when the 4AGZE (Supercharged) MR2 crowd went looking for more power than pulleys could offer.
Note that this engine came from the factory with a S/C setup (in the US MR2 and the overseas FWD Levin GTZ) and these guys were adding a turbo to blow through the SC and reach higher boost. It was useful back when turbos took forever to spool up, the Roots blower on the GZE engine gave the car nice low end torque until the turbo could take over. The SC was clutch activated and just spun freely at higher boost from the turbo.
If you're building forced induction from the ground up, this is not a good idea. Turbo technology has advanced so much, the twincharged engines are all mostly turbocharged now.
This is another good one... ... Heh, I kinda miss my Toyota days now
... I'll go take the KP61 Starlet for a spin now
