There needs to be a new category extension for Sonic Adventure (DX) and that new category extension is called "Characters where they aren't meant to be" because people can do speedruns for characters in levels they're not supposed to be in like Tails in Sonic's section of Casinopolis or Knuckles in Twinkle Park. Theultimategamer95 did a speedrun for Tails in Sonic's section of Casinopolis and I did a speedrun for Knuckles in Twinkle Park. Here are the videos of those examples: Please put a new category extension up for them.

Nothing is planned for that, we aren't interested to add dead leaderbords just so people can get free WR. If you ever get multiple people running them, then maybe we will reconsider, but for now, it's not happening, sorry.