|$7E0660||32 bytes||Misc.||Gets overwritten by the HDMA table for the level ending circle. If the player gets above or below the borders of the screen, it will buffer overflow to $7E:0680 and beyond, (thus its a glitch).|
Otherwise cleared on reset and titlescreen load, but usage as empty RAM is definitely not recommended.
Note to mods: its called "buffer overflow".
Technically this is incorrect, since $7E04A0 overflows into $7E0660 and beyond. There really isn't a need to update the current description, though.