If you want to peep the "SouljaGame Handheld" before its inevitable demise, it's up for sale on the "SouljaWatch" merch website for $100, though there's no mention of compatible games. As with his Nintendo knock-offs, it seems Soulja is just drop-shipping the portable device from China (at least according to this AliExpress listing of an identical $33 "Onleny" handheld) and charging triple the original asking price.
The SouljaWatch homepage also features a "SouljaGame" console that looks like an Xbox One with elongated PS4 controllers. Other product highlights include Apple AirPods knock-offs, a SouljaPad tablet, an Apple Watch lookalike and a smartphone (which we assume comes preloaded with a Crank That (Soulja Boy) ringtone).
To be clear, Soulja Boy is a massive gaming nerd who's named mixtapes after Mario and even reviewed Braid, so he likely knows the value of his third-rate wares. His other hapless dalliance with tech included hoverboards that were snapped up by fraudsters, leaving Soulja with a $175,000 bill for Stripe payments that never materialized.