Sprites with red hitboxes always hurt sprites with green hitboxes have special collision, with no main pattern purple hitboxes are badniks and so on. Sonic and Tails have two hitboxes: the inner one is for interaction with things that can hurt Sonic, the outer one is for sprites and terrain. Solidity is displayed as color overlays: green overlay means only the top is solid (ground) red overlay means all but top solid (wall/ceiling) blue overlay means all solid (ground/wall/ceiling) no overlay means not solid. While rings and sprites show, only rings on the same vertical slice as Sonic (give or take) can be taken, and Tails (or Sonic) will generally not interact with sprites that are offscreen. If the selected object is offscreen, the emulator will display centered on the selected object. With 'scroll lock' on, camera hack is disabled otherwise, you can scroll through objects with 'page up'/'page down' or return to Sonic with 'home'. With 'num lock' on, the base address of objects is shown, as well as the angle on the ground. It is only safe to use them for the corresponding games (and some limited hacks of each). These are emulators compiled with Upthorn's and Nitsuja's camera hack, solidity display and hitbox display.
