Wii does not do RAM encryption (which is somewhat understandable given the fact that the RAM is mostly embedded 1T-SRAM that is not directly accessible anyway).

Wii does not do RAM encryption (which is somewhat understandable given the fact that the RAM is mostly embedded 1T-SRAM that is not directly accessible anyway). As far as I know the only two systems that use cryptographically meaningful memory encryption are Xbox 360 and zArchitecture mainframes. Various secure crypto processors usually have some support for external "encrypted" SRAM, but as this typically involves microcontroller platforms and byte/word-wide accesses to said memory the implementation in the best case boils down to CTR mode (usually of some secret semi-proprietary algorithm of questionable cryptographic qualities) without IV or any authentication.