Hellmark

That would be a logistical and legal nightmare. In order to do that, they'd have to create a new flash component, as Adobe has totally restricted who and what can even access their flash SDK. Creating something from scratch with 100% compatibility, is very difficult. Not only that but would require some clean "white room" style reverse engineering, basically having programmers who have never seen the existing Flash codebase poke and prod at a binary to see how it works, documenting the full process. If things are not done very carefully, Adobe could sue them. For an optional thing, as part of a option, it ranks too low on Nintendo's priorities to put the amount of effort and money into doing.

Adobe for several years now has been working on killing off Flash completely, with the stated intended purpose of instead backing HTML5. Mobile support has been killed off, with mobile support being killed that also kills off embedded productions such as game consoles, and Linux Support has been effectively killed. It is a matter of time before Mac and Windows support is ended as well.