https://www.3dbrew.org/w/index.php?curid=742&diff=20817&oldid=20764 <-- Can you explain yourself here? Over 50,000 people have arm9 hacked their system with seedminer (that's just using website stats, reality is prob higher). And it works on the latest firm. Its fully software based too (and totally free for JPN).
You can add platform character behavior to any sprite, just disable the default controls for it, and make it jump/move in your code. The rectangle behavior is cool too for enemies.
Yea it does. And you can add platform character behavior to your own charcter, and it will have move and jump already setup for you, space bar is jump, arrows move