The 045E86 to 048236 range
Subroutines and data used by movement values

46C5E to 46C6D - A series of 00 01s and 00 05s, used to determine if the sprite moves up or down. (see below)
46C6E to 46C76 - Routine that takes the direction Ness is facing and uses it to call a table (see above) to determine which way the target sprite moves.