I have a lot of suggestions (it's ok if you ignore the ones that are already present in versions 0.217 and bellow)
Emeraldia (Virtual Console) (Released in 2007 by Namco?/Nintendo?) (Practically Arcade since Wii VIrtual Console supports arcade games like this)
Brick Game 9999 in 1 (Handheld)
Planet X1 (Released in 2009? by The 8-Bit Guy) (VIC-20 Cartridge)
Nyantari (Released in 2011 by Tjoppen) (Atari 2600 Cartridge)
Nyan Cat (Released in 2011 by HOOY-PROGRAM ) ( ZX Spectrum Tape?)
Nyan Cat (Released in 2011?) (Atari 800 Cartridge?)
7 Grand Dad (Released in 1992 by J.Y. Company) (Bootleg of The Flintstones: The Rescue of Dino & Hoppy ) (NES Cartridge)
Windows 98 (not the actual OS from 1995) (Released in 2002? by Bei Tongfang) (NES Cartridge)
Samsung Galaxy S (Released in 2010 by Samsung) (Smartphone)
Nokia 3310 (not the 2000 version) (Released in 2017 by Nokia) (Phone)
Sony Ericsson W950 (Released in 2006 by Sony) (Phone) (you can also include any other model if you want)
Nokia N8 (Released in 2010 by Nokia) (Phone)
Samsung Galaxy (Not to be confused with Samsung Galaxy S) (Released in 2009 by Samsung) (Smastphone)
Multimedia 955 (Released in 1998 by Packard Bell) (PC)
SegaSonic Bros. (From 1992 by Sega (Unreleased)) (Arcade)
Any Gamecube CHDs or NDS Cartridges (since both Gamecbe and NDS are supported)
Any Mattel Juice Box cartridges other than what it's already supported (you can buy them from Amazon and dump them)
Toy Story Toys On The Move! (Released in 2010 by Jakks Pacific) (Plug-and-Play game)