Updated | Halo for Game Boy Advance?

Backing-up this negative viewpoint is Bungie itself, who had this to say on the matter:

[i]"Recent internet reporting has suggested that a Game Boy version of Halo is in the works. We can officially lay that rumor to rest. There is no Game Boy version of Halo planned, and none in production. It's very unlikely that such a version would ever happen for all the obvious reasons, and the less obvious reasons, that the ColecoVision talks fell apart and The Bandai Pippin version is taking up all our development bandwidth