This is mostly just obvious fluff, but one interesting side effect of having emulated versions of games is that it forces you to figure out the specification of the hardware it runs on. Systems that would go undocumented otherwise will now at least have their CPU or ISA documented.
The spongebob console uses a SPG240-series System on a Chip, which got used in various b-market and bootleg consoles. I didn't even know SoCs existed as a concept back in the day. I just thought they crammed all of the hardware in there somehow. Apparently they go back as far as the 1970s with LED wristwatches.
The chip has 10KB of RAM and a 25.75 MHz processor. For comparison,
>the SNES has 256 KB of RAM (divided between audio and video), and runs at 3.58 MHz tops.
>The GBA has a 16.7 MHz ARM CPU and about 300 KB of RAM in total.
The SPG240 wins out in terms of pure CPU frequency, which is surprising. I can't find whether they have a separate RAM chip as well though.
One more interesting thing about these is that they roll their own proprietary ISA for the chip. It's neither an ARM/RISC-based CPU or an x86 one.
The Taiwanese company that used to make these (Sunplus) doesn't release datasheets for it to the public, which sucks. They seem to make car dashboard displays nowadays.