The Battle Network is the sixth tier in Make a Good Mega Man Level 2. It is a cyberspace network created by Dr. Snicker and populated by Robot Masters who most definitely were not coerced into populating this very legitimate tier, for certain. This tier has the levels ranked 42nd to 35th, with the boss being Cheat Man from Rockman CX.
Tier 6 makes a small cameo in Make a Good Mega Man Level: Episode Zero. Located in the same spot as in MaGMML2, it is home to a training simulation where Zero can test his various weapons and chips against a Dan Hibiki hologram to measure their DPS. An Astro Switch can be pressed to toggle i-frames on the hologram, and a small ladder leads to an instant energy refill for all weapons and chips.
There is a hidden area underneath the area with the teleporter to Cheat Man, which can be reached by using the Rush Jet or Super Arrow from the area with Duwang. This contains a large bolt and Stove Man (a.k.a. Konro Man) from Rockman & Forte: Mirai Kara no Chousensha, likely representing The Stove Guy.